ENGINEERING DESIGN MANUAL VOLUME 9–I ENGINEERING SPECIFICATION SPECIFICATION
PDVSA N
°
CONTROL CONT ROL VALVES ALVES
K–332
0 REV.
AUG.94
FOR APPROVAL
DATE
APPD.BY Eliecer Jiménez
1994
TITLE
DESCRIPTION DATE
8
L.T.
E.J.
A.N.
PAG.
REV.
APPD.
APPD.
DATE
AUG.94
AUG.94 APPD.BY Alejandro Newski
ESPECIALISTAS
ENGINEERING SPECIFICATION SPECIFICATION
CONTROL VALVES
–332 PDVSA K –332 REVISI O ON N
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Index Page
1 SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
2 CODES, STANDARDS AND PRACTICES . . . . . . . . . . . . . . . . . . . .
3
3 DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
4 DESIGN REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.11 4.12 4.13
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Control Valve Body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Co Valve Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Positioners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electro – Pneumatic Convertors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Handwheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Solenoid Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Limit Switches and Valve Position Transmitters . . . . . . . . . . . . . . . . . . . . . . Volume Boosters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Lock Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Self Acting Regulating Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 5 5 6 6 6 7 7 7 7 8 8 8
5 SPECIFICATION FORMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
6 INSTALLATION AND COMMISSIONING . . . . . . . . . . . . . . . . . . . . . .
8
7 Q.A. / Q.C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
ENGINEERING SPECIFICATION
CONTROL VALVES
PDVSA K –332 REVISI ON
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FOREWORD
This document is the result of several years ’ work by engineers in the petroleum industry of Venezuela (PDVSA). The recommendations presented in this publication are not intended to supersede applicable laws and regulations. Users of this recommended practice are reminded that no publication of this type can be complete, nor, can any written document, be substituted for qualifed engineering analysis. Suggested revisions are invited and should be submitted to:
The manager PDVSA Engineering Standards, C/O INTEVEP – TENA División, Apartado 76343 Caracas – 1070A Venezuela
ENGINEERING SPECIFICATION
CONTROL VALVES
PDVSA K –332 REVISI ON
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SCOPE This section covers PDVSA requirements for the design, specification, installation and commissioning of control valves. All guidelines of the introduction specification K – 300 shall also be explicitly followed. These specifications also serve for valves used on emergency shut off services but attention is drawn to paragraph 4.1.12 with respect to their use.
2
CODES, STANDARDS AND PRACTICES A.N.S.I. B16.104 A.P.I. RP – 550 F.C.I. 70 – 2 I.S.A. R.P.75.01 to 75.16 I.S.A. N.A.C.E.
3
Manual on refinery instrument installation Valves calculations Standards for control valves Handbook of control valves.
DEFINITIONS All definitions are listed in specificatio n K – 300.
4
DESIGN REQUIREMENTS
4.1
General
4.1.1
The control valves shall be air operated.
4.1.2
The body shall be 1 – inch, carbon steel, flanged 300 lbs. A.N.S.I. minimum except for line sizes smaller than 1 – inch in which case the appropriate line size body shall be used. The valve trim shall be 316 stainless steel minimum.
4.1.3
Globe or eccentric rotary plug type valves shall be considered the first option. The type of internals viz single seat, double seat, cage, Lo – dB, stellited, etc., shall be carefully selected to suit the particular application.
4.1.4
Ball, flangeless eccentric rotary, flangeless butterfly based on 60 maximum opening, angle, etc. type, of valve shall be used depending on the particular application subject to PDVSA approval.
4.1.5
The control valve shall be sized taking into account the minimum, normal and maximum operating conditions. The finally selected item shall ensure that the valve operates between 17 and 90 percent opening in accordance with I.S.A. – S75.11. The valve shall also operate without any cavitation and produce a noise level less than 85 dB.
4.1.6
Valves on hydrogen sulfide and other toxic ambience conditions shall conform to the appropriate N.A.C.E. specifications.
°
ENGINEERING SPECIFICATION
CONTROL VALVES
PDVSA K –332 REVISI ON
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The control valve shall be single seated in tight shut off services. The valve leakage class shall be as per ANSI B16.104/FCI standard 70 – 2. An extract from the standard is listed below. The seating shall be soft seat or metal to metal to suit the process operating conditions.
Valve Class
Maximum Leakage rate
IV
0.01 % of rated valve capacity
V
5 x 10 – 4 ml per minute of water per inch of orifice diameter per psi differential (5 x 10 – 12 m3 per second of water per mm of orifice diameter per bar differential)
VI
4
Nominal Port Diameter Milimeters
Inches
ml per minute
Bubbles per minute
25
1
0.15
1
38
1 1/2
0.30
2
51
2
0.45
3
64
2 1/2
0.60
4
76
3
0.90
6
102
4
1.70
11
152
6
4.00
27
203
8
6.75
45
4.1.8
The speed of response of the valve shall be carefully examined to ensure compliance with the particular application requirements. For eg. valves in compressor surge system; tanker and other pipeline loading systems are required to complete their full travel in 1 to 5 seconds. However caution must be exercised in determining the full open to full close duration to ensure that there are no occurrences of surge pressures due to sudden valve closures.
4.1.9
Valves with liners on body and trims with vulcanised liners shall be subject to careful analysis and PDVSA approval.
4.1.10
By – pass valves shall only be installed after a “HAZOP” study has been performed. Block valves and by – pass manifold shall be in accordance with I.S.A. standard RP 75.06.
4.1.11
Three way control valves shall be used, subject to PDVSA approval.
4.1.12
Valves used on emergency shut off service applications shall be dedicated solely to that service only and shall not be used for normal process control purposes.
ENGINEERING SPECIFICATION
CONTROL VALVES
PDVSA K –332 REVISI ON
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Control Valve Body
4.2.1
Control valve body material shall conform to the pipe line specification in which they are installed. Carbon steel shall be the minimum. The end connections shall conform with the respective piping specification – RF, RTJ, flat face, etc.
4.2.2
Extended Bonnets shall be provided on fluid operating temperatures above 230 C or below 0 C. °
°
4.2.3
Bellows seal bonnets shall be provided on all toxic and hazardous fluids and also when it is necessary to ensure no leakage to atmosphere along the stem in order to comply with E.P.A. emission regulations.
4.2.4
The use of angle valves shall kept to a minimum and are subject to PDVSA approval.
4.2.5
The use of welded end connections and items on hydrogen, hydrogen sulfide, cryogenic, pipeline services, etc., shall be subject to careful analysis and PDVSA approval.
4.2.6
Screwed end connections shall only be used on non – hazardous fluids operating below 50 C and 50 P.S.I.G. (3.5 kg/cm 2) and body sizes below 1 – inch. °
4.3
Valve Trim
4.3.1
The valve C.V. shall be calculated in accordance with equations in ISA standard S 75.01.
4.3.2
The trim type viz. Single or double seat, low noise, cage, soft seat, cavitation – free, etc., shall be selected to suit the particular application.
4.3.3
The valve characteristic viz. equal percentage, linear, on – off, etc., shall be selected to suit the particular application and process operating data.
4.3.4
The ISA handbook shall be used for selection guidance.
4.3.5
Where the selected valve does not comply with requirements of paragraph 4.1.5 consideration shall be given to increase the available pressure drop and as a last resort to installation of two valves in parallel, one large and one small with split range operation.
4.3.6
Butterfly valves shall be sized on maximum 60 operation.
4.3.7
The valve plug shall be solid. The trim material shall be 316 stainless steel minimum. Other materials shall be used to suit the fluid erosion and corrosion properties. Stellite or harder trim material shall be used on:
°
Flashing fluids Fluids with entrained solids Pressure drops over 14 kg/cm 2 G. (200 P.S.I.G).
ENGINEERING SPECIFICATION
PDVSA K –332
CONTROL VALVES
REVISI ON
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4.4
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Packing TEFLON shall be used for fluid temperatures upto 230 C. °
GRAFOIL containing zinc corrosion inhibitor shall be used for all higher temperatures.
4.5
Actuators
4.5.1
The actuator shall be corrosion resistant to marine and any other specified toxic ambience.
4.5.2
Pneumatic diaphragm or piston type actuator shall be used to ensure that the valve: a.
Operates correctly under all specified operating conditions
b.
Withstands a pressure drop equal to the maximum upstream pressure
c.
Speed of response complies with the process operational requirements.
4.5.3
The shaft stem shall be solid and linked positively to the valve plug. Shaft thrust bearings shall be provided as necessary to ensure smooth operation.
4.5.4
The use of electro – hydraulic, electric, hydraulic or digital actuators on special applications are subject to PDVSA approval.
4.5.5
The fail position of the actuator on the loss of actuating medium fluid viz. air, hydraulic or electric shall be carefully evaluated and specified to ensure safe operating condition of the plant and/or equipment.
4.6
Positioners
4.6.1
All valves shall be fitted with pneumatic positioners. Electro – pneumatic positioners shall be used on all applications where the positioner operation is not affected by line vibrations. Exceptions are on – off valves and certain flow or liquid pressure loops where the added positioner gain could lead to instability. These exceptions are subject to PDVSA approval.
4.6.2
The input signal shall be 3 to 15 P.S.I.G. The output shall suit the selected actuator.
4.6.3
Positioners shall be complete with bypass, input, output and air supply gauges and an air filter set.
4.6.4
The positioner and all accessories shall be corrosion resistant to marine atmosphere. The tubing between positioner and actuator shall be P.V.C. covered 316 stainless steel.
ENGINEERING SPECIFICATION
CONTROL VALVES
PDVSA K –332 REVISI ON
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Electro – Pneumatic Convertors
4.7.1
When specified they shall be suitable for specified 4 – 20 or 4 – 12 or 12 – 20, m.A. D.C. input operation. The output shall be 3 – 15 P.S.I.G. The convertor shall be certified intrinsically safe.
4.7.2
The convertor and all accessories shall be corrosion resistant to marine atmosphere.
4.7.3
The convertor shall be mounted on a suitable vibration free bracket.
4.8
Handwheels
4.8.1
These shall be supplied when specified. They shall be declutchable type with a clear indication of the neutral position.
4.8.2
The handwheel mechanism shall not increase frictional load of the actuator and operable even against the specified maximum differential pressure.
4.8.3
Clutch/linkage mechanisms on rotary valves shall be designed such that the control of the valve position is not lost when engaging the handwheel.
4.8.4
Hand wheel shall be specified only after a ‘‘HAZOP’’ study has been performed.
4.9
Solenoid Valves
4.9.1
When specified they shall be installed in the output tubing between the positioner and the valve actuator.
4.9.2
They shall be 3 – way, 1/4” N.P.T.F. 316 stainless steel body type with resilient seats and 24 volts D.C hermetically potted coil suitable for operation at 50 C ambient temperature. They shall be suitable for operation in intrinsically safe circuits and provided with a manual reset lever when specified. °
4.9.3
4.10
If an airlock valve is specified for the system the solenoid valve shall be installed between the air lock valve and the actuator.
Limit Switches and Valve Position Transmitters
4.10.1
When specified they shall be linked directly to the valve stem.
4.10.2
The limit switches shall be snap acting hermetically sealed micro – switch and rated for operation at 1 amp. at 24 volts D.C.
4.10.3
The transmitter output shall be 4 to 20 m.A. D.C.
4.10.4
All electrical items shall be certified for use in intrinsically safe circuits and corrosion resistant to marine atmosphere.
ENGINEERING SPECIFICATION
CONTROL VALVES
PDVSA K –332 REVISI ON
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Volume Boosters
4.11.1
Volume boosters shall be installed, when necessary to increase speed of response of the control valve.
4.11.2
The booster shall be installed in the output tubing between the positioner and the valve actuator.
4.12
Air Lock Valves
4.12.1
When specified the air lock valve shall be installed between the positioner and the actuator.
4.12.2
The air supply for the lock valve shall be the same as for the valve positioner.
4.12.3
The item shall be corrosion resistant to marine atmosphere and the setting shall be tamper – proof.
4.13
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Self Acting Regulating Valves
4.13.1
They shall be used on inert services such as water, air or nitrogen and noncritical services such as fuel gas to pilot burners.
4.13.2
All actuators shall be capable of withstanding the maximum specified upstream pressure.
4.13.3
Body and trim shall conform with guidelines in this specification.
SPECIFICATION FORMS FORM No.
TITLE
20.50
Control valves
20.50X
On/off valves with positive closure
20.51
Self acting pressure regulator
20.52
Self acting temperature regulator
The forms are included at the end of this specification.
6
INSTALLATION AND COMMISSIONING All installation and commissioning shall be performed in accordance with project drawings and specifications.
7
Q.A. / Q.C. All items shall conform with the procedures in specification K – 369.
ITEM N
°
CONTROL VALVES
OFF
QUANTITY
SHEET
PROJECT REFERENCE N
o 1 Tag N Non–Flashing
By
°
SPECIFICATION REFERENCES I.S.A S 75.01 PDVSA–K–332
OF REVISED
DATE
Service Flashing
Erosive
Corrosive
With solids
Liquid
Gas
Steam
Service conditions Process Data
Units
2
BODY
IN
13 Size–Inches 16 Type 17 19 20 21 22 24 25
TRIM
Normal
Minimum
Flow rate Inlet pressure Outlet pressure Temperature Specific gravity or molecular WT Viscosity Compressibility factor Specific heat ratio Critical pressure For flashing services only C.V. Noise level Required ANSI/FCI Leakage Max. Diff. pressure valve should withstand
Pipe line
Maximum
Size Mfr & Model Body/Bonnet Matl Liner Yes No End Conn. In Out Flg Face Finish End Ext. Yes No
SCH ANSI Class
Matl.
Matl.
cP z K PSIA C.V. dB Class OUT
Pc % Flash Calculated Calculated Four SCH
Gas C.V.
Five
Vapour pressure Liquid C.V Selected Selected Six (Bubble Tight)
INSULATION ACTUATOR
53 56
Type
57 58 62 63 64 65
Fail Action Open Close Working Pressure Máx. Min. Bench Range Orientation STD. Other Yes No Handwheel Type No Set at Air Failure Valve Yes
67 68 70 69
Input Signal Type Mfr. & Model On Incr Signal Output
On/Off
Modulating
Maintain Last Position
26 27 28 29 30
Flow Direction Bonnet Lub & Iso Valve Packing Material Packing Type
74
Type
32
Type
75
Mfr. & Model
33
Size
76
Contacts/Rating
34
Characteristic
77 79
Actuation Points Mfr. & Model
35
Seats 1
36
Rated Cv
80 81
Set Pressure Supply Pressure
37
Plug/Ball/Disk Matl.
43
38
Seat Material
1. NEC Class Group Div. Intrinsically safe 2. All items shall be corrosion resistant to marine atmosphere and tropicalised
Soft seat
Yes
No
Rated Travel
2
Balanced
Unbal
FL
Yes
39
Cage/Guide Material
40
Stem Material
No
XT
Matl.
POSITIONER Gauges
By–Pass Incr
Decr
LIMIT SWITCHES
Valve Open Filter Máx.
Valve Shut AIR SET Gauges Min.
NOTES 20.50
ENGINEERING SPECIFICATION
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CONTROL VALVES Line
Explanation of Terms and Definitions
PROJECT
Specify project name for which control valve is intended.
UNIT
Specify unit within project.
ITEM
Specify item number of purchase order.
DATA SHEET
Specify data sheet number. Normally assined by purchaser.
SPECIFICATION REFERENCES
Specify number of technical specification on which valve selection is based.
FL–13265–A
TAG
Specify piping and instrumentation diagram number, loop diagram number, engineering flow diagram number, etc.
17–453
FLUID SERVICE
Describe service of control valve and/or pipe line number.
Examples XYZ Nuclear Ps #1 3 3 of 12
Feedwater control Reheat spray 2’’ MA 1051 WA7
NOTE: The above lines are suggested only and may be modified to fit the individual company’s needs. If the provided space is insufficient, add an additional sheet and refer to it.
Line N° 1
Explanation of Terms and Definitions Describe fluid flowing into valve and its state. Indicate corrosive or erosive service and the corrosive or erosive agents. Specify thermodynamic critical pressure of the fluid.
Examples Superheated stream Saturated water Crude oil and natural gas 3206 psia 300 gpm 10000 bpd 600 std. m 3 /s 7500 scfm 300 kg/h
2
Specify volumetric or mass flow rate at inlet or standard conditions. Maximum flow conditions, if greater than normal flow condition, is the condition for which the vave is sized.
3
Specify inlet pressure (gauge or absolute)
5000 psig 2000 kPa abs.
4
Specify outlet pressure (gauge or absolute)
1000 psig 400 kPa gauge
5
Specify inlet temperature in °F, °R, °C or K. Must agree wiht state of fluid. Identify the appropiate term.
750°C 200°C 815 K
6
Specify specific weight (in lb/ft 3 or kg/m 3), specific gravity, or molecular weight of fluid. Identify the appropiate term.
61,9 lb/ft3 1.03 44.01
7
Specify viscosity in appropriate units for liquids or specific heats ratio for gases.
20 centiopoise 17.8 centistokes 1.27
ENGINEERING SPECIFICATION
INSTRUCTIONS TO FILL FORM 20.50
PDVSA 20.50 REVISI ON
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Specify vapor (saturation) presure at inlet temperature in absolute units. Only required for liquid flow.
680 psia. 46,9 bar abs.
Specify required Cv as calculated for each condition per ANSI/ISA S75.01–1986. No additional safety (oversize) factor should be included at this point.
260
Specify laboratory–measured allowable and predicted sound pressure levels, both normally in dBA as measured per ISA–S75.07–1987.
90/87 dBA
Extra line form infomation not covered in lines 1 through 11.
Compressibily factor Z Ambient temperatue
13 & 14
specify size and schedule (or wall thickness if nonstandard) of pipe line into which valve is installed.
8” SCH 40 15” OD x 0.500” wall SN200, PN100
15
Specify pipe line insulation. This information is required for predicted sound pressure level calculations
2” thermal None Globe (through, angle) Split body Double port Butterfly Ball Pinch
16
Specify type of valve body.
17
Specify nominal size of valve body. Specify ANSI class in accordance with ANSI B16 34–81
18
Specify maximum pressure and temperature of the valve
19
Specify manufacturer and model number
20
Specify body liner material
Steel, ASTM 216, WCB
21
Specify body liner material, if any, and its inside diameter.
Polyurethane, 3.9”
22 & 23
Specify end connection. May be integral or welded onto body.
4” 600 2500 SPECIAL 2500 psig, 650 °F XYZ Controls Model 719–2
6” RTJ Class 1500 flange Buttweld end 2” FNPT
24
Specify flange face finish per ANSI B16.5–81 or special finish as required.
ANSI B16.5–81 Special finish: 32 RMS
25
Specify end extensions, if any. Normally, refers to sections of pipe or reducers welded to the body by the valve m anufacturer.
6” long, SCH 80, A106, GR. B
26
Specify direction of the flow through the body. FTO = flow–to–open, FTC = flow–to–close valve.
FTO FTC
NOTE: The descriptors ‘‘FTO” and ‘‘FTC” refer to the direction of fluid forces on the closure member. If immaterial, leave blank. When FTO and FTC are not applicable, specify direction as appropiate. 27
Specify type of bonnet
28
Specify whether a lubricator and isolation valve are required Specify lubricant
29
Specify packing material.
Standard Cooling fin Extended Yes Silicone Graphite impref. asbestos TPE Non–asbestos
ENGINEERING SPECIFICATION
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30
Specify type of packing
Braided Molded V–ring Laminated filament Pressure/Vacuum
31
Extra line for special body or bonnet not covered in lines 16 through 30.
Body drain Separable flanges Flangeless
32
Specify type of trim
33
Specify nominal size and rated travel of installed trim
34
Specify inherent flow characteristic of installed trim
35
Specify whether trim is balanced or unbalanced. Semi–balanced trim should be considered as balanced.
Balanced Unbalanced
36
Specify rated Cv, F L and XT of installed trim. Refer to ANSI/ISA–S75.01 – 1986.
260 0.9 0.68
37
Specify closure member, i.e., plug, ball, or disk material as applicable.
38
Specify seat material.
420 hardened 316 hardfaced
39
Specify cage, bearing, or guide material.
410 hardened
40
Specify stem material
41 & 42 43
44–52
Single seat cageguided Multi–stage Multi–hole Top–and bottom–guide Double seat
Linear Equal % Modified parabolic Quick – opening
17–4 PH, H–1150 316
17–4 PH H–1150 316
Extra lines for additional trim requirements not covered in lines 32 through 40. Specify hazardous location classification per the ANSI/NFPA 70–1987
2” 50 mm
National Electrical Code ®,
Specify special requirements and/or accesories not covered elsewhere.
53
Specify type of actuator
54
Specify manufacturer and model number.
55
Specify nominal size and effective diaphragm/piston area.
56
Specify whether actuator is for on/off of modulating service.
Chrome–plate Pilot–operated NEC Class 1, Div. 1, Group C
Solenoid valves E/P transducer NACE MR–01–75 Seismic Net Weight = 275 lb Diaphragm, pneumatic Hydr. piston, double–acting Pneumatic rotary vane XYZ Controls P–100–160 8” 160 square inch 0,2 m2 Modulating On/off
ENGINEERING SPECIFICATION
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57
Specify whether spring/if any, acts to open or to close valve.
Open Close None
58
Specify maximum pressure for which the actuator is designed.
59
Specify minimum pressure required to fully stroke the installed valve under specified conditions.
65 psig
60 & 61
Specify limits of avalable air or hydraulic suppli pressure. If upper limit is greater than line 58, a reducing valve (air set) should be furnished. Lower limit or reducing valve setting must be higher than pressure shown on line 59.
90 psig/70 psig
62
Specify the pressures in the actuator when valve stars travel and at its rated travel position without fluid forces acting on the valve.
8/32 psig 10/22 psig 1,2/2,1 kPa
63
Specify orientation of actuator as ‘‘VERT.UP”or ‘‘VERT.DOWN” (vertical) or ‘‘HORIZ.” (horizontal). For rotary valves, also specify whether mounting is ‘‘RH” (right–hand) or ‘‘LH” (left–hand) as viewed from valve inlet, if appropiate. Specify additional information as appropriate or provide sketch.
VERT.UP HORIZ. RH LH
64
Specify type and orientation of handwheel (manual override), if any.
65
Specify if air failure valve (actuator air lock–up valve) is required and at what supply pressure it shuts.
Yes 40 psig
66
Extra line for additional actuator requirements not covered in lines 53 through 65.
Hydraulic damper Stroking speed I”/sec. Stainless steel tubing
67
Spedicy input signal range for full travel.
3–15 psig 200–100 kPa 4–20 mA
68
Specify type of positioner
None Single acting Double acting
69
Specify manufacturer and model number.
70
Specify whether an increasing signal increases or decreases out–put pressure to actuator.
71
Specify whether air pressure gauges and positioner are required.
72
Specify cam characteristic, if positioner has a cam. Normally linear
73
Extra line for positioner requirements
74
Specify type and quantity of limit switches
Mech. (lever arm) Proximity Pneumatic 2
75
Specify manufacturer and model number
ABC Electric Co. Model A20Z
76
Specify electrical rating and number of contacts and action
77
Specify valve travel at which switches are to actuate.
79
Specify manufacturer and model number of air set (pressure regulator)
100 psig 60 kPa
Top–mounted Side–mounted/LH
XYZ Control Co. Model AB Incr. Decr. No Yes Linear Square root Aluminum–free
10A, 600 VAC/DPDT Full open/full close RBJ Co. Model R–70
ENGINEERING SPECIFICATION
INSTRUCTIONS TO FILL FORM 20.50
PDVSA 20.50 REVISI ON
DATE
0
AUG.94
Page Menú Principal
Indice manual
Indice volumen
5
Indice norma
80
Specify output pressure setting
81
Specify whether filter and/or output pressure gauge is required.
83
Specify pressure of hydrostatic test. Normally per ANSI B16.37–80 or API 6A–83.
3350 psig
84
Specify leakage class per ANSI/FCI 70–2–76.
Class IV
85 & 86 NOTES
Extra lines for additional test requirements not covered in lines 83 and 84.
70 psig 20 psig Yes NO
Hydro for 30 minutes Helium leak test Stroking time test Dead band test
ITEM N
°
ON/OFF VALVES FOR POSITIVE CLOSURE OFF
QUANTITY
N
°
SPECIFICATION REFERENCES I.S.A S 75.01 PDVSA–K–301 o 1 Tag N Non–Flashing
SHEET
PROJECT REFERENCE
By
OF REVISED
DATE
Service Flashing
Erosive
Corrosive
With solids
Liquid
Gas
Steam
Service conditions Process Data
Units
2
Flow rate Inlet pressure Outlet pressure Temperature Specific gravity or molecular WT Viscosity Compressibility factor Specific heat ratio Critical pressure For flashing services only C.V. Noise level Required ANSI/FCI Leakage Max. Diff. pressure valve should withstand IN SCH Pipe line 13 Size–Inches 16 Type BODY 17 Size ANSI Class 19 Mfr & Model 20 Body/Bonnet Matl Yes No Matl. 21 Liner 22 End Conn. In Out 24 Flg Face Finish No 25 End Ext. Yes Matl.
cP z K PSIA C.V. dB Class OUT
Pc % Flash Calculated Calculated Four
Vapour pressure Gas C.V. Liquid C.V Selected Selected Five Six (Bubble Tight)
SCH
INSULATION ACTUATOR
53 56
Type
57 58 62 63 64 65
Fail Action Open Close Working Pressure Máx. Min. Bench Range Orientation STD. Other Handwheel Yes No Type No Set at Air Failure Valve Yes
67 68 69 70
Input Signal Type Mfr. & Model On Incr Signal Output
Packing Type
74
Type
32
Type
75
33
Size
76
Mfr. & Model Contacts/Rating
34
Characteristic
77
Actuation Points
35
Seats 1
79
Mfr. & Model
Rated Cv
80
36
Set Pressure Supply Pressure
37
Plug/Ball/Disk Matl.
38
Seat Material
26 27 28 29 30 TRIM
Maximum
Flow Direction Bonnet Lub & Iso Valve Packing Material
Soft seat
Yes
No
Rated Travel
Balanced
Unbal
FL
Yes
39
Cage/Guide Material
40
Stem Material
XT
81 43
No
Matl.
On/Off
Maintain Last Position
POSITIONER Gauges
By–Pass
Incr
Decr
LIMIT SWITCHES
Valve Open Filter Máx.
Valve Shut AIR SET Gauges Min.
1. NEC Class Group Div. Intrinsically safe 2. All items shall be corrosion resistant to marine atmosphere and tropicalised
NOTES 20.50X
ITEM N
°
PRESSURE CONTROL VALVES PILOTS AND REGULATORS
QUANTITY
OFF
SHEET
PROJECT REFERENCE N
°
SPECIFICATION REFERENCES I.S.A S 75.01 PDVSA–K–301 o 1 Tag N Non–Flashing
By
OF REVISED
DATE
Service Flashing
Erosive
Corrosive
With solids
Liquid
Gas
Steam
Service conditions Units Process Data
Pipe line BODY
TRIM
2 Flow rate Inlet pressure Outlet pressure Temperature Specific gravity or molecular WT Viscosity Compressibility factor Specific heat ratio Critical pressure For flashing services only C.V. Noise level Required ANSI/FCI Leakage Max. Diff. pressure valve should withstand IN SCH 13 Size–Inches 16 Type 17 Size ANSI Class 19 Mfr & Model 20 Body/Bonnet Matl Yes No Matl. 21 Liner 22 End Conn. In Out 24 Flg Face Finish 25 End Ext. Yes No Matl. 26 Flow Direction 27 Bonnet 28 Lub & Iso Valve Yes No 29 Packing Material 30 Packing Type 32 33 34 35 36 37 38 39 40
MFR. NOTES
Type Rated Travel Size Characteristic Seats 1 2 Balanced Unbal Rated Cv FL XT Plug/Ball/Disk Matl. Seat Material Soft seat Yes No Matl. Cage/Guide Material Stem Material
Maximum
Normal
Minimum
cP z K PSIA C.V. dB Clas s OUT
Pc % Flash Calculated Calculated Four
Vapour pressure Gas C.V. Liquid C.V Selected Selected Five Six (Bubble Tight)
SCH
INSULATION
19
Type of Actuator
20 21 22 23 24 25 26 27
Pilot Supply to Pilot Self Cont. Ext. Conn. Diaphragm Material Diaghragm Rating Spring Range Set Point
28 29 30 31 32 33
Filt. Reg. Supply Gage Line Strainer Housing Vent Internal Relief
ACTUATOR/PILOT
ACCESORIES
Model No 1. All items shall be corrosion resistant to marine atmosphere 20.51
CATÁLOGO DE INGENIERÍA
INSTRUCTIONS TO FILL FORM 20.51
PDVSA 20.51 REVISI ON
DATE
0
AUG.94
Page Menú Principal
Indice manual
Indice volumen
1
Indice norma
PRESSURE CONTROL VALVES – PILOT & REGULATORS
1–4.
Identification and service or location. It is assumed that each tag number is for a single valve. 5. Pressure reducing, back pressure control, or differential pressure regulator. 6. Globe, angle, or Manufacturer’s Standard (MFR.STD.). 7. Body connection size and inner valve size. 8. Guiding may be top, top and bottom, skirt, or MFR.STD. Select single or double port, if applicable. 9. Specify screwed (NPT), flanged, or weld end; and flange rating, such as 150 lb ANSI. 10–11 Specify materials. 12.
Write in ‘‘yes’’ or use check mark if required.
13.
Quick open, equal percent, linear, etc.
State Characteristic: L LV EP EPT EPB Q
= = = = = =
Linear Linear V Port Equal Percentage Equal Percentage Turned Equal Percentage Balanced Quick Opening
Or use your own code and identify in notes. 14. 15. 16. 17. 18. 19. 20. 21. 22.
Refers to seal between body and top works, such as diaphragm, stuffing box, etc. Refers to seat, plug, stem; in general, all internal wetted parts. Use only to specify soft seat, otherwise material will be same as trim specified in line 14. Use if required. Max allowable sound level dBA 3 ft from pipe and 3 ft downstream of the valve outlet. Actuator may be spring type or springless pressure balanced. The pilot is a integral or external auxiliary device which amplifies the force available through an operating medium, usually air. Give pressure available and specify medium. Refers to valve pressure sensing system. Specify whether controlled pressure is sensed internally or by means of an external line requiring an additional piping connection.
CATÁLOGO DE INGENIERÍA INSTRUCTIONS TO FILL FORM 20.51
PDVSA 20.51 REVISI ON
DATE
0
AUG.94
Page Menú Principal
Indice manual
Indice volumen
2
Indice norma
23–24. Specify diaphragm material and pressure or temperature limits, if applicable. 25.
Range over which pressure setting can be made.
26.
Specification of set pressure does not apply to factory setting. This must be called for specifically, if required.
27.
Specify filter regulator, with or without gage, if required for air supply to pilot. Write ‘‘yes’’ or use check mark.
28.
specify if strainer is to be furnished with valve. Write ‘‘yes’’ to check off; or give style or model number.
30–31. Options available in gas regulators. On line 30 specify‘‘bug–proof’’ if required. 34.
State liquid, steam, gas units gpm, lb/h/ft 3 /min. etc.
35.
Name of fluid and state whether vapor or liquid if not apparent.
36.
State maximum quantity required by process and corresponding C v.
37.
State operating quantity required by process and corresponding C v.
38.
The manufacturer shall fill in the valve C v and FL (Liquid Pressure) Recovery Factor without reducers or other accesories.
39.
Operating inlet pressure and pressure differential with units (psia, psig, inches H2O or Hg). Note at this point that one might consider how minimum conditions will fit the sizing.
40.
Maximum inlet pressure if different from normal.
41.
State the maximum pressure drop in shut–off position to determine proper actuator size. This is actual difference in inlet and outlet pressure stated in psi, inches of H 2O or Hg, etc.
42.
State F or C.
43.
State operating specific gravity and molecular weight.
44.
State operating viscosity and its units. State flash at valve outlet, i.e., of max flow that will be flashed to vapor because of the valve pressure drop.
45.
In the case of vapor, state superheat and in the cases of liquid, state the solids, if present.
46.
Note vapor pressure of fluid as well as the critical pressure.
47.
Give manufacturers predicted sound level dBA.
48.
Complete when available.
°
°
ITEM N
°
SELF–ACTUATED TEMPERATURE REGULATORS OFF
QUANTITY
SHEET
PROJECT REFERENCE N
°
SPECIFICATION REFERENCES I.S.A S 75.01 PDVSA–K–304 o 1 Tag N Non–Flashing
By
OF REVISED
DATE
Service Flashing
Erosive
Corrosive
With solids
Liquid
Gas
Steam
Service conditions Units Process Data
26 27 28 29 30
Flow Direction Bonnet Lub & Iso Valve Packing Material
NOTES
Yes
No
Packing Type
32
Type
33
Size
34
Characteristic
35
Seats 1
36
Rated Cv
37
Plug/Ball/Disk Matl.
38
Seat Material Soft seat
MFR.
Normal
Minimum
2 Flow rate Inlet pressure Outlet pressure
Temperature Specific gravity or molecular WT Viscosity Compressibility factor Specific heat ratio Critical pressure For flashing services only C.V. Noise level Required ANSI/FCI Leakage Max. Diff. pressure valve should withstand IN SCH Pipe line 13 Size–Inches 16 Type BODY 17 Size ANSI Class 19 Mfr & Model 20 Body/Bonnet Matl Yes No Matl. 21 Liner 22 End Conn. In Out 24 Flg Face Finish No 25 End Ext. Yes Matl.
TRIM
Maximum
Rated Travel
2
cP z K PSIA C.V. dB Class OUT 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Pc % Flash Calculated Calculated Four SCH
Gas C.V.
Five
Vapour pressure Liquid C.V Selected Selected Six (Bubble Tight)
INSULATION
Fill: SAMA Class
ACTUATOR/PILOT
Bullb Type Bulb Material Extension Length Insertion Length Bulb Connection Capilllary Material Armor Capillary Length Well Material Well Connection ‘‘U” Dimension ‘‘T” Dim Adjustable Range ACCESORIES Integral Thermometer
31 Balanced
Unbal
FL
Yes
39
Cage/Guide Material
40
Stem Material
No
XT
32 33
Matl.
Model No 1. All items shall be corrosion resistant to marine atmosphere
S20.52
ENGINEERING SPECIFICATION
INSTRUCTIONS TO FILL FORM 20.52
PDVSA 20.52 REVISI ON
DATE
0
AUG.94
Page Menú Principal
Indice manual
Indice volumen
1
Indice norma
SELF–ACTUATED TEMPERATURE REGULATORS
1. Identification of item by tag number. 2. Process area or function. 3. Stream description and/or pipe size or vessel number with which valve is used.. 4. Function heating or cooling. 5. Specify nominal size of body and trim in inches. 6. Single port (SP); 2. Double port (DP); 3. Three–way. 7. Specify screwed or flange rating and facing. 8. Specify material of body such as bronze, carbon steel, cast iron, etc. 9. Specify material of trim such as bronze, 316 stainless steel, etc. 10. State Characteristic: L
=
Linear
LV EP EPT EPB Q
= = = =
Linear V Port B = Blending Equal Percentage Equal Percentage Turned Equal Percentage Balanced = Quick operating
Or use your own code and identify in notes. 11. Specify seat material such as 316 stainless steel, Buna N, etc. 12. Specify open or close. 13. Filled thermal system instruments are classified as follows: Class IA: Class IB: Class IIA: Class IIB: Class IIC: Class IID: Class IIIA:
Liquid filled, uniform scale, fully compensated. Liquid filled, uniform scale, case compensated only. Vapor pressure, increasing scale, with measured temp. above case and tubing temp. Vapor pressure, increasing scale, with measured temp. below case and tubing temp. Vapor pressure, increasing scale, with measured temp. above and below case and tubing temp. Vapor pressure, increasing scale, above, at, and below case and tubing temp. Gas filled, uniform scale, fully compensated.
ENGINEERING SPECIFICATION INSTRUCTIONS TO FILL FORM 20.52
PDVSA 20.52 REVISI ON
DATE
0
AUG.94
Page Menú Principal
Indice manual
Indice volumen
2
Indice norma
Class IIIB: Gas filled, uniform scale, case compensated only. Class VA: Mercury filled, uniform scale, fully compensated. Class VB: Mercury filled, uniform scale, case compensated only. 14. State whether plain, averaging, sanitary bulb. 15. Give material and type of bulb and extension; such as 316 SS. 16. Write in length of extension, ‘‘adj’’ for adjustable or ‘‘rgd’’ for rigid. 17. The bulb insertion length should be given if no well data are shown. 18. Specify size of jam nut or union connector; or part number. 19. Specify material of capillary tubing. 20. Specify material of armor (Bronze, 316 SS, etc.) or write ‘‘None’’. 21. Specify length in feet. 22. Specify well material such as bronze, 304 stainless steel, 316 stainless steel, monel, etc. 23. Specify process connection size and type, such as 3/4 in. NPT, 1 1/2 in. 150 lb RF, etc. 24. Specify ‘‘U’’ dimension from face of thread to tip of well. Specify ‘‘T’’ (lagging extension) dimension in inches. 25. Note adjustable range available from the manufacturer. 26. Specify range, or write in ‘‘None’’. 27. State liquid, steam, gas units gpm, lb/h/ft 3 /min. etc. 28. Name of fluid and state whether vapor or liquid if not apparent. 29. State maximum quantity required by process and corresponding C v. 30. State operating quantity required by process and corresponding C v. 31. The manufacturer shall fill in the valve C v and FL (Liquid Pressure) Recovery Factor without reducers or other accesories. 32. Operating inlet pressure and pressure differential with units (psia, psig, inches H2O or Hg). Note at this point that one might consider how minimum conditions will fit the sizing. 33. Maximum inlet pressure if different from normal. 34. State the maximum pressure drop in shut–off position to determine proper actuator size. This is actual difference in inlet and outlet pressure stated in psi, inches of H2O or Hg, etc. 35. State F or C. °
°
36. State operating specific gravity and molecular weight.
ENGINEERING SPECIFICATION
INSTRUCTIONS TO FILL FORM 20.52
PDVSA 20.52 REVISI ON
DATE
0
AUG.94
Page Menú Principal
Indice manual
Indice volumen
3
Indice norma
37. State operating viscosity and its unit. State flash at valve outlet, i.e., of max flow that will be flashed to vapor because of the valve pressure drop. 38. In the case of vapor, state superheat and in the cases of liquids, state the solids, if present. 39. Note vapor pressure of fluid as well as the critical pressure. 40. Give manufacturers predicted sound level dBA. 41. Complete when available.