Flange Fitters Hand Book

FLANGE FITTERS’ HANDBOOK

OBJECTIVE • To make leak-free flange connections SCOPE • The process of making flange connections. • Type of connections - pipe to pipe, pipe to equipment, instrument to pipe, and vessel trim flange connections including blind flange connections • The items involved - gaskets, studs, stud bolts, nuts. • Preparatory actions - cleaning, lubrication, alignment, tightening.

2

HEALTH AND SAFETY – Minimize the risks of following activities which are typical for making flanged connections. • Working at height • Working under scaffolding • Working on scaffolding • Working with lifting tools • Rigging pipe; supporting pipe, components and equipment • Large/heavy tool handling • Use of long handled or extended tools • Working with cleaning agents and lubricants • Foreign/falling objects, fragments, debris, and splinters • Working in high temperatures, dry environment, wind and dust • Working near energized electrical units. • Working near hazardous substances (Hydrocarbons, chemicals) and near construction activities or commissioning activities • Working under time pressure 3

REQUIRED PPE (MINIMUM) • Safety shoes • Cover all with long sleeve shirt • Safety glasses/goggles • Safety hard hat • Working gloves • Hearing protection, when applicable SAFETY GOAL • Return home safe and sound. Supervisory staff have a special responsibility to ensure the site is a safe place to work and to ensure that everyone is working in a safe manner. TIGHTNESS GOAL – To achieve leak-free joints, supervisor must ensure • Fitters are qualified • Adequate tools and materials are arranged • Calibrated torque wrenches are provided • Whether the flange requires hydraulic tensioning as per table • Fitter completes the flange protocol 4

GENERAL CHECK POINTS BEFORE MAKING FLANGE CONNECTIONS

• • • • • • • • •

Line size correct Material correct Flange rating correct Stress relieving complete Welding complete Installation straight and plumb Line slopes as per drawing NDT complete Flange facings protected against mechanical damage and corrosion

5

FLANGES

• Flange type, material, rating correct against ISOs and MTOs. • Flange mating surfaces must be cleaned where required before installation of gasket. Remove previous gasket residue and substances such as dirt, oil, and grease. Also remove preservative coatings. • Use a wire brush for cleaning. The brush must be compatible with the flange material, so do not use carbon steel brush on SS flanges. Brush gently in the direction of the serrated rings of the gasket contact area. Make sure the serrated rings profile is maintained.

6

FLANGES

• Inspect flange gasket seating areas on scratches, dents, scoring, and other damage. Minor damage may be acceptable – consult Field Engineering when in doubt. • General guideline: Damage (scratch, pit, or pitted area) shall not be deeper than serration depth, and under 30% of the gasket contact area width, measured in radial direction. If the damages are outside above acceptance criteria, the flange has to be replaced or re-machined. • The nut seating surface must be flat and must provide a low friction, full contact area.

7

GASKETS, BOLTS AND NUTS • Gaskets have been selected to make a leak-free flange connection throughout the range of expected operating pressures and temperatures. • Correct type, material – check color code of gaskets • Correct gasket thickness and pressure rating • Check stud bolt: materials, length, diameter, against ISOs and MTOs. • Check threads of bolts are undamaged. • Threads of stud bolts and nuts must be cleaned with a suitable solvent. • Threads of stud bolts and nuts must be coated with an approved lubricant before installation. LUBRICANTS • As lubricant only use Molykote 1000 • Lubricate “working” surfaces – liberally coat all internal and external thread surfaces and nut/washer faces 8

ATTENTION POINTS – DURING FLANGE INSTALLATION Follow the tightening sequence as below. • Install 50% of the stud bolts and nuts, finger-tight and gently tighten the rest of the stud bolts • Hand-tighten all nuts. • Bolts shall be tightened in a controlled sequence as follows.  1st pass: 30% of Specified Torque Value  2nd pass: 60% of Specified Torque Value  3rd pass: 100% of Specified Torque Value  Final pass: Check at 100% of Specified Torque Value • Follow the tightening sequence as per table with bolts numbered clockwise around the flange.

9

ATTENTION POINTS – DURING FLANGE INSTALLATION

• Flange face alignment must be within 1.5 mm per 305 mm pipe diameter. On pipe to pipe flanges, loosen adjacent pipe supports and adjust to achieve proper alignment. • Note: bolting hardware shall be installed and nuts tightened sufficiently to remove slack prior to measuring alignment. 10

ATTENTION POINTS – DURING FLANGE INSTALLATION • Never adjust the equipment to achieve flange alignment. • Alignment of flange studs, bolts or holes must be within 1.5 mm as measured along the bolt circle. Generally, if the bolt/stud slips in the flange holes easily, the alignment is satisfactory. • Measure gaps between the flanges around the circumference to verify parallelism. Measure at four equally spaced locations for flanges up to 8 bolts; at every other stud bolt for flanges with more than 8 bolts and at 16 equally spaced locations for flanges with more than 32 stud bolts.

11

ATTENTION POINTS – DURING FLANGE INSTALLATION • When performing pipe to equipment fit-up, only the pipe shall be adjusted. Never adjust the equipment. • Stud bolts length must protrude two (2) to three (3) threads beyond the nut. • Stud bolts with diameter over 1-1/8” must have one and a half (1.5) full stud diameter beyond the nut to allow tensioning (install stud bolt with the stud marking always visible). In case of equipment flanges the stud bolt must protrude 1.5 times full stud diameter at the end pointing away form the equipment.

12

ATTENTION POINTS – DURING FLANGE INSTALLATION • Never use tape to fix gasket except to centre large or vertically oriented gaskets, where an engineering approved adhesive (e.g. Super 77 by 3M) may be used • Never re-use a gasket. Quarantine used gaskets immediately away from unused gaskets • Check for presence of double and missing gaskets. • Never cut or deform gasket to fit a flange. • Only use stud bolts and nuts that are clearly marked with material grade. • Use temporary gasket only for temporary joints – that is joints for flushing and hydro testing. Temporary gaskets must be painted BLUE on the entire outer rim to ensure detection at MC punch.

13

ATTENTION POINTS – AFTER FLANGE INSTALLATION

• Stud bolts must protrude 2 threads each nut • After hydraulic tensioning completion, protruding 1.5 D thread ends greased and covered by plastic caps. • Make sure all stud bolts are in and tight and specified torque values have been achieved. • Clear identification by means of Tag to indicate that torquing or tensioning has been completed. • Flange Protocol is signed by Fitter, Supervisor and Inspector.

14

GENERAL ATTENTION POINTS • • • • • • • • • • •

Branches located correctly Branches reinforced Weep holes in reinforcing pads and trunnion supports High point vents installed Low point drains installed Reducers located correctly Reducer type correct Blinds installed Cold spring or pre-spring installed as per drawing Clearance for thermal expansion/contraction OK Spools, fittings and piping items kept internally clean and closed – openings capped unless they are worked on. • Flange facings protected against mechanical damage and corrosion.

15

VALVES • Flow direction correct [uni-flow valves, special attention for equipment (pump, SRVs) isolation] • Item code correct • Stud bolts and nuts correct • Chain wheel installed • Extension installed • Stem orientated properly • Drain and flush connections installed • Check for rising stem obstructions. Are protectors required? • Check specifications for by-pass around valves (pump check valves, stem lines, etc.). • Control valves and plug cocks lubricated • During flushing all valves to be replaced by Temporary Spools • During testing Special valves to be replaced by Temporary Spools

16

PIPE SUPPORTS • Field supports installed. • Sufficient supports, adequately spaced • Correct supports (stops/guides for restricted axial, lateral and up-lift movements). • Anchors installed. • Proper shoes installed and welded. • Trunnion supports provided with telltale or weep hole. • Spring hangers/supports properly installed.

17

PIPE SUPPORTS

• Check insulated lines for shoes, right height? Welded properly? Ensure proper positioning in relation to support base to allow for expansion. • Alloy lines must be checked carefully. Any additionally welded supports may require stress relieving. Clamp types may be used. • Large diameter lines must be checked carefully. Gas lines and supports not designed for hydrotest may require temporary supports, or special permission for pneumatic test. • Ensure small diameter take-offs like vents, drains are properly fixed/supported. • Check lines at pumps and other (rotating) equipment carefully for undue stresses on equipment flanges

18

SCREWED CONNECTIONS AND SEAL WELDING • Screwed connections are only allowed in certain utility services (e.g., cooling/service water, tool/instrument air). • Seal welding is not permitted. • Use of tape not permitted. • Threading compound may be used when approved by procedure. • Check for presence (strictly prohibited for process/hydrocarbon services) of screwed connections at package units and valves, etc. INSULATING GASKET KITS • Parts of insulating kits must never be mixed. • Ensure no conducting paths for the two mating flanges • Never use pneumatic impact wrenches

19

INSULATION AND TRACING • Insulation support clips installed. • Clearances adequate for insulation • Insulation well sealed, no ingress of water, electrical conductivity of insulation expansion joints secured? • Insulation thickness correct? • Electric tracing installed. • Correct numbers of tracing.

20

INSULATION AND TRACING • Tracer correct size. • Tracer length correct. • Steam/condensate stations well arranged tracer loop identification clear on station valves? • Trap (steam) detail correct. • Leak nipples in reinforcing pads/protrude insulation. • Earthing studs on equipment / structure accessible. • Insulation details at pipe penetrations – grating, sheeting

21

INSTRUMENTS

• PSVs to be certified (pop and leak test max 3 month prior to actual use) and sealed (correct item number/set pressure). • Bellow type PSVs provided with screwed-in bug screen in body vent hole. • Correct CVs installed after flushing (pipe spool during hydro testing & flushing) • Meter runs properly installed (jacking screws included). • Valves at meter runs installed. • Pressure gauge valves installed. • Temperature connections properly oriented. • Sample connections installed. • Weep hole in outlet pipe (nipple protrude through insulation).

22

ALLOY LINES • Stress relieving completed. • Check color coding. • Valves and gaskets must be checked in detail for compliance to specs.

HYDROTESTING CRA AND SS LINES • Ensure testing water is clean and contains max. 2 ppm Cl. • Arrange for draining and drying ASAP after test completion.

23

BOLT AND NUT MARKING B7

2H

SPIRAL WOUND GASKET

24

COMB PROFILE GASKET

METALLIC RING TYPE GASKET

25

FLANGE MARKING

Standard-Material-Size-Class-schedule-Heat no-(groove type)-Mesc No

Following table is given as a sample reference for flange marking. Standard

Material

Size

Class

Schedule or wall thickness

Groove type (For RTJ flanges)

MESC No

 ASME B16.5  MSSSP 44  API 6A

A105 etc..,

½”; 1” etc..,

150; 300; etc..,

Sch 40; sch XXX; etc..,

R24;34 etc..,; BX151;BX153 etc..,

117 766286.788

26

FLANGE MATERIAL STANDARD AND GRADES AT HARWEEL Carbon steel Flanges ASTM A694-F65 ASTM A105 MSS-SP-44 Gr. F65 MSS-SP-44 Gr. F60 Low Temperature Carbon Steel Flanges ASTM A350-LF2. Stainless Steel Flanges ASTM A182-F316 ASTM A182 F44 Carbon steel Flanges with CRA cladding MSS-SP-44 Gr. F65 + CLAD UNS N06625 (Alloy 625 cladding)

Low Temperature Carbon Steel Flanges with CRA cladding ASTM A350-LF2 + CLAD UNS N08825 (Alloy 825 cladding) A350-LF2 + CLAD UNS N06625 (Alloy 625 cladding) Corrosion Ressistant Alloy (CRA) flanges Alloy 825 - ASTM B564 UNS N06625 (Alloy 625 solid) Alloy 625 - ASTM B564 UNS N08825 (Alloy 825 solid) 27

MATERIAL COLOR CODING Stud bolts & Nuts

Colour

ASTM A193 Grade B7

White

ASTM A193 Grade B7M

Lemon

ASTM A193 Grade B8

None

ASTM A 320 Gr.L 7

None

ASTM A 320 Gr.L 7M

Currant Red

ASTM A 453 Gr.660 Class D UNS S66286

Green

ASTM A 637 UNS N07718 (BS381C-363)

Yellow

28

Gaskets

Colour

Spiral wound gaskets shall be colour coded as follows

Winding

Filler/ inner

Winding: SS-316 / Filler: Graphite/Outer Ring: CS/ Inner Ring: SS-316 (or) 316L

Green

Grey

Winding: SS-6Mo / Filler: Graphite/ Outer Ring: CS/ Inner Ring: SS-6Mo

Rail Red

Grey

Winding: Incoloy 825 / Filler: Graphite/ Outer Ring: CS/ Inner Ring: Incoloy 825

White

Grey

Winding: Inconel 625 / Filler: Graphite/ Outer Ring: CS/ Inner Ring: Inconel 625

Gold

Grey

29

STUD BOLTS AND NUTS Colour coding - Each stud bolt and nut must be marked with paint on each end, to the colour indicated in above Table. The grade stamp marks shall be provided on the heads of the stud bolt, one end of stud bolts and one side of each nut.

30

COLOUR CODING

Spiral wound gasket with SS 316 winding (winding: green, filler: grey) 31

Stud bolt & gasket color code by piping class (reference of piping classes from HWL-0-0003-401-Rev-C) Piping class

Stud bolt color code

Gasket color code Winding material

11025X

Lemon

11410X

White

11430X

White

11440X

Lemon

11441X

Lemon

11460X

Lemon

11470X

Yellow

Filler material

11501X 13410X

White

13460X 13620X 16620X

WHITE

18410X

White

31025X

Lemon

31031X

White

32




31160X

White

31441X

Lemon

31441Y

Lemon

31460X

Lemon

31470X

None

Filler material

31501X 33460X 33620X 36620X

White

61440X

Lemon

61441X

Lemon

61460X

Lemon

61480X 61501X 63620X

33




Filler material

66520X 66620X

White

66620Y

White

91025X

Lemon

91176X 91440X

Lemon

91441X

Lemon

91480X 91501X 91501Y 93460X 93620X 96520X 96620X

White

96620Y

White

34




Filler material

151025X

Lemon

151521X

Lemon

251485X

Lemon

251521X

White

White

501605X

-

Hub connector

Hub connector

506520X

Yellow

RTJ gasket (R)

RTJ gasket (R)

506620X

Yellow

RTJ gasket (r)

RTJ gasket (R)

1001485X

Yellow

RTJ gasket (BX)

RTJ gasket (BX)

1001605X

-

Hub connector

Hub connector

1006520X

Yellow

RTJ gasket (BX)

RTJ gasket (BX)

White

13021X 33021X 63460X 66520S 66620S

White

35




Filler material

63620S 93620S 96520S 96620S

White

153460X 153620X 156520X

Yellow

256520X

Yellow

1006520Y

Yellow

RTJ gasket (BX)

RTJ gasket (BX)

61440I 61440Z 61460P

Lemon

91441P 91441Z

White

96620Z

White

36



1001440Z

Yellow

91410X

White

33410X

White

93410X

White


Filler material

RTJ gasket (BX)

RTJ gasket (BX)

93021X 153021X 31410X

White

33620S 36620S

White

13460Y 151501X 31430X

White

91176Y 93460Y 96620M 18081X

White WHITE

37

FLANGE ALIGNMENT – ACCEPTANCE CRITERIA ALIGNMENT DEFINITIONS FOR PIPING FLANGE JOINTS PARALEL TOLERANCE; FLANGES UP DEFINITIES TO 4” 150# (K1-K3/K2-K4) = 0.57mm UITLIJN VOOR LEIDINGFLENZEN FLANGES > 4” (K1-K3/K2-K4) MAX. 2.5mm/m (OD Flange) PARALEL UITLIJNING FLENZENPARALEL t /m 10”TOLERANCE; = MAX 0.5 mm RE Equipment Flange OD van af 12” = MAX. MAX1.0 (K1-K3/K2-K4) FLENZEN mm < 300mm 0.2mm 300-600mm 0.3mm > 600mm 0.5mm

K1=L1

K4=L4

K2=L2

K3=L3

SEE DEP 31.38.01.11-Gen Appendix 12

Flange alignment tolerances (additions to ASME B16.5)

HARTLIJNTOLERANCE; UITLIJNING LATERAL FLANGES MAX22mm mm FLENZENUP t/mTO 4” 3” ==Max. FLANGES 4” af 4” == Max. MAX.3mm 3 mm FLENZEN>van

38

FLANGE CONNECTING TO ROTATING EQUIPMENT (pumps, compressors, etc.) The flange face alignment check shall be performed with bolting inserted loosely, and the acceptance criteria shall be as given below: Flange Diameter (DN)

Maximum misalignment at OD of flange

< 300

0.2mm

300 to 600

0.3mm

> 600

0.5mm

Final acceptance of the rotating equipment (suction/discharge) flange alignment SHALL be witnessed by Clie

Deviation Initial Measurement 50% Torque

Final Measurement 100% Torque

K1

….

K 3

….

K1-K3 = …….

K2

….

K 4

….

K2-K4 = …….

L1

….

L3

….

L1-L3 = MAX

L2

….

L4

….

L2-L4 = MAX

MAX Value as per table 2&3

39

Maximum Flange joint miss-alignment tables Table 1 ASME B16.5 flanges, all sizes, all ratings Maximum flange face misalignment: For pre-assembled joint up to and including 600#, maximum difference in measured values = 2.5mm/m For an individual flange, maximum difference to design plane = mm/m This results in the following figures for measurements taken at the outer rim of the flange: Pre-assembled joint M (mm)

Individual flange compared to design plane

Size DN

150#

300#

600#

900#

1500#

2500#

Size DN

150#

300#

600#

900#

1500#

2500#

15

0.22

0.24

0.24

0.30

0.30

0.33

15

0.16

0.17

0.17

0.21

0.21

0.24

20

0.25

0.29

0.29

0.33

0.33

0.35

20

0.17

0.21

0.21

0.23

0.23

0.25

25

0.27

0.31

0.31

0.37

0.37

0.40

25

0.19

0.22

0.22

0.26

0.26

0.28

40

0.32

0.39

0.39

0.44

0.44

0.51

40

0.22

0.27

0.27

0.31

0.31

0.36

50

0.38

0.41

0.41

0.54

0.54

0.59

50

0.27

0.29

0.29

0.38

0.38

0.42

80

0.48

0.52

0.52

0.60

0.67

0.76

80

0.34

0.37

0.37

0.43

0.47

0.54

100

0.57

0.64

0.68

0.73

0.78

0.89

100

0.40

0.45

0.48

0.52

0.55

0.63

150

0.70

0.79

0.89

0.95

0.98

1.21

150

0.49

0.56

0.63

0.67

0.70

0.85

200

0.86

0.95

1.05

1.17

1.21

1.38

200

0.61

0.67

0.74

0.83

0.85

0.98

250

1.02

1.11

1.27

1.37

1.46

1.68

250

0.72

0.79

0.90

0.97

1.03

1.19

300

1.21

1.30

1.40

1.52

1.68

1.91

300

0.85

0.92

0.99

1.08

1.19

1.35

350

1.33

1.46

1.51

1.60

1.87

350

0.94

1.03

1.07

1.13

1.32

400

1.49

1.62

1.71

1.76

2.06

400

1.06

1.14

1.21

1.25

1.46

450

1.59

1.78

1.86

1.94

2.29

450

1.12

1.26

1.31

1.39

1.62

500

1.75

1.94

2.03

2.14

2.46

500

1.23

1.37

1.44

1.52

1.74

600

2.03

2.29

2.35

2.60

2.92

600

1.44

1.62

1.66

1.84

2.07

NOTE: Blank cells indicate size rating values not standardized in ASME B16.5

40

Table 2 ASME B16.47, series A, all sizes, larger than 600# Maximum flange face misalignment at raised face OD: For pre-assembled joint, 1.75 mm For individual flange, maximum difference to design plane=

mm

This results in the following figures for measurements taken at the outer rim of the flange: Pre-assembled joint Size DN

ASME B16.47, series A 150# 300# 600#

Individual flange compared to design plane 900#

Size DN

ASME B16.47, series A 150# 300# 600#

900#

650

1.93

2.06

2.14

2.35

650

1.37

1.46

1.51

1.66

700

1.92

2.06

2.13

2.36

700

1.36

1.45

1.50

1.67

1750

1.91

2.05

2.13

2.36

750

1.35

1.45

1.50

1.67

800

1.91

2.05

2.12

2.34

800

1.35

1.45

1.50

1.65

850

1.91

2.04

2.14

2.32

850

1.35

1.44

1.51

1.64

900

1.90

2.03

2.10

2.29

900

1.35

1.44

1.49

1.62

950

1.92

2.02

950

1.36

1.43

1000

1.90

2.00

1000

1.35

1.41

1050

1.90

2.00

1050

1.34

1.41

1100

1.89

1.99

1100

1.34

1.41

1150

1.90

2.01

1150

1.34

1.42

1200

1.89

1.99

1200

1.34

1.41

1250

1.88

1.98

1250

1.33

1.40

1300

1.88

1.98

1300

1.33

1.40

1350

1.88

1.98

1350

1.33

1.40

1400

1.88

2.01

1400

1.33

1.42

1450

1.90

2.01

1450

1.34

1.42

1500

1.89

1.99

1500

1.33

1.41

NOTE: Blank cells indicate size rating values not standardized in ASME B16.47

41

Table 3 ASME B16.47 flanges, series B, all sizes, larger than 600# Maximum flange face misalignment at raised face OD  For pre-assembled joint, 1.75mm For individual flange, maximum difference to design-plane =

mm

This results in the following figures for measurements taken at the outer rim of the flange: Pre-assembled joint


Size DN

150#

300#

600#

900#

Size DN

150#

300#

600#

900#

650

2.03

2.27

2.37

2.54

650

1.44

1.60

1.68

1.79

700

2.03

2.26

2,35

2.56

700

1.43

1.60

1.66

1.81

750

2.01

2.23

2.31

2.51

750

1.42

1.58

1.63

1.78

800

2.03

2.20

2.28

2.52

800

1.44

1.56

1.62

1.78

850

2.01

2.19

2.26

2.53

850

1.42

1.55

1.60

1.79

900

2.00

2.17

2.25

2.50

900

1.41

1.54

1.59

1.77

950

2.02

1.99

950

1.43

1.41

1000

2.01

2.00

1000

1.42

1.41

1050

1.97

1.98

1050

1.40

1.40

1100

1.97

1.98

1100

1.40

1.40

1150

1.96

1.99

1150

1.39

1.41

1200

1.95

1.97

1200

1.38

1.39

1250

1.95

1.97

1250

1.38

1.39

1300

1.95

1.96

1300

1.38

1.39

1350

1.95

1.98

1350

1.38

1.40

1400

1.94

1.97

1400

1.37

1.39

1450

1.94

1.95

1450

1.37

1.38

1500

1.94

1.95

1500

1.37

1.38

42


mm



Size DN

150#

300#

600#

900#

Size DN

150#

300#

600#

900#

650

2.03

2.27

2.37

2.54

650

1.44

1.60

1.68

1.79

700

2.03

2.26

2,35

2.56

700

1.43

1.60

1.66

1.81

750

2.01

2.23

2.31

2.51

750

1.42

1.58

1.63

1.78

800

2.03

2.20

2.28

2.52

800

1.44

1.56

1.62

1.78

850

2.01

2.19

2.26

2.53

850

1.42

1.55

1.60

1.79

900

2.00

950

2.02

1000

2.17 2.25 2.50 900 1.41 1.54 1.59 1.77 Slide containing torque values to be added 1.99

950

1.43

1.41

2.01

2.00

1000

1.42

1.41

1050

1.97

1.98

1050

1.40

1.40

1100

1.97

1.98

1100

1.40

1.40

1150

1.96

1.99

1150

1.39

1.41

1200

1.95

1.97

1200

1.38

1.39

1250

1.95

1.97

1250

1.38

1.39

1300

1.95

1.96

1300

1.38

1.39

1350

1.95

1.98

1350

1.38

1.40

1400

1.94

1.97

1400

1.37

1.39

1450

1.94

1.95

1450

1.37

1.38

1500

1.94

1.95

1500

1.37

1.38

43


mm



Size DN

150#

300#

600#

900#

Size DN

150#

300#

600#

900#

650

2.03

2.27

2.37

2.54

650

1.44

1.60

1.68

1.79

700

2.03

2.26

2,35

2.56

700

1.43

1.60

1.66

1.81

750

2.01

2.23

2.31

2.51

750

1.42

1.58

1.63

1.78

800

2.03

2.20

2.28

2.52

800

1.44

1.56

1.62

1.78

850

2.01

2.19

2.26

2.53

850

1.42

1.55

1.60

1.79

900

2.00

950

2.02

1000


950

1.43

1.41

2.01

2.00

1000

1.42

1.41

1050

1.97

1.98

1050

1.40

1.40

1100

1.97

1.98

1100

1.40

1.40

1150

1.96

1.99

1150

1.39

1.41

1200

1.95

1.97

1200

1.38

1.39

1250

1.95

1.97

1250

1.38

1.39

1300

1.95

1.96

1300

1.38

1.39

1350

1.95

1.98

1350

1.38

1.40

1400

1.94

1.97

1400

1.37

1.39

1450

1.94

1.95

1450

1.37

1.38

1500

1.94

1.95

1500

1.37

1.38

44


mm



Size DN

150#

300#

600#

900#

Size DN

150#

300#

600#

900#

650

2.03

2.27

2.37

2.54

650

1.44

1.60

1.68

1.79

700

2.03

2.26

2,35

2.56

700

1.43

1.60

1.66

1.81

750

2.01

2.23

2.31

2.51

750

1.42

1.58

1.63

1.78

800

2.03

2.20

2.28

2.52

800

1.44

1.56

1.62

1.78

850

2.01

2.19

2.26

2.53

850

1.42

1.55

1.60

1.79

900

2.00

950

2.02

1000


950

1.43

1.41

2.01

2.00

1000

1.42

1.41

1050

1.97

1.98

1050

1.40

1.40

1100

1.97

1.98

1100

1.40

1.40

1150

1.96

1.99

1150

1.39

1.41

1200

1.95

1.97

1200

1.38

1.39

1250

1.95

1.97

1250

1.38

1.39

1300

1.95

1.96

1300

1.38

1.39

1350

1.95

1.98

1350

1.38

1.40

1400

1.94

1.97

1400

1.37

1.39

1450

1.94

1.95

1450

1.37

1.38

1500

1.94

1.95

1500

1.37

1.38

45


mm



Size DN

150#

300#

600#

900#

Size DN

150#

300#

600#

900#

650

2.03

2.27

2.37

2.54

650

1.44

1.60

1.68

1.79

700

2.03

2.26

2,35

2.56

700

1.43

1.60

1.66

1.81

750

2.01

2.23

2.31

2.51

750

1.42

1.58

1.63

1.78

800

2.03

2.20

2.28

2.52

800

1.44

1.56

1.62

1.78

850

2.01

2.19

2.26

2.53

850

1.42

1.55

1.60

1.79

900

2.00

950

2.02

1000


950

1.43

1.41

2.01

2.00

1000

1.42

1.41

1050

1.97

1.98

1050

1.40

1.40

1100

1.97

1.98

1100

1.40

1.40

1150

1.96

1.99

1150

1.39

1.41

1200

1.95

1.97

1200

1.38

1.39

1250

1.95

1.97

1250

1.38

1.39

1300

1.95

1.96

1300

1.38

1.39

1350

1.95

1.98

1350

1.38

1.40

1400

1.94

1.97

1400

1.37

1.39

1450

1.94

1.95

1450

1.37

1.38

1500

1.94

1.95

1500

1.37

1.38

46

Best Practices

47

Best Practices

F

S I

F 0

S I

48

Best Practices

49

Best Practices

50

Best Practices

51

52

Flange Fitters Hand Book

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