Materials Syste Syst em Specif pecific ica ati tion on 04-SAMSS-042
11 October 2010
4-Way Diverter Valve Document Responsibility: Valves Standards Committee
Saudi Saudi Aramco Aramc o Desk DeskTop Top Standards Standards Table Table of Cont ents 1
Scope............................... Scope............................................. ........................... ............... .. 2
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Conflicts and Deviations......................... Deviations................................ ....... 2
3
References................................ References.................. ........................... .................... ....... 2
4
General............................... General............................................ .......................... ............... 3
5
Design.............................. Design........................................... .......................... ................ ... 3
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Materials............................. Materials.......................................... .......................... ............... 4
7
Operation............................. Operation........................................... .......................... ............ 5
8
Testing and Inspection........................... Inspection.................................. ....... 5
9
Marking............................... Marking............................................ .......................... ............... 5
10
Shipping............................ Shipping......................................... .......................... ................ ... 6
Previous Issue: 25 October 2009 Next Planned Update: 11 October 2015 Revised paragraphs are indicated in the right margin Primary contact: contact: Shiha, Saad Mohammed Mohammed on 966-3-8760163 Copyright©Saudi Aramco 2010. All rights reserved.
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Document Responsibility: Valves Standards Committee Issue Date: 11 October 2010 Next Planned Update: 11 October 2015
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04-SAMSS-042 4-Way Diverter Valve
Scope This specification, along with the purchase order, defines the minimum requirements for steel 4-way diverter valves with resilient seats for bi-directional meter prover systems in nominal pipe sizes (NPS) 2 through 24 inch for ASME Classes 150 through 600. Valves covered by this specification shall be suitable for non -sour hydrocarbon services up to a maximum temperature of 120°C.
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Conflicts and Deviations 2.1
Any conflicts between this specification and other applicable Saudi Aramco Materials System Specifications (SAMSSs), Engineering Standards (SAESs), Standard Drawings (SASDs), or industry standards, codes, and forms shall be resolved in writing by the Company or Buyer Representative through the Manager, Consulting Services Department of Saudi Aramco, Dhahran.
2.2
Direct all requests to deviate from this specification in writing to the Company or Buyer Representative, who shall follow internal company procedure SAEP-302 and forward such requests to the Manager, Consulting Services Department of Saudi Aramco, Dhahran.
References Referenced standards and specifications shall be the latest edition, revision or addendum in effect on the date of the purchase order unless otherwise stated. 3.1
Saudi Aramco References Saudi Aramco Engineering Procedure SAEP-302
Instructions for Obtaining a Waiver of a Mandatory Saudi Aramco Engineering Requirement
Saudi Aramco Materials System Specifications 04-SAMSS-003
Additional Requirement for Low Temperature Valves
04-SAMSS-035
General Requirements for Valves
04-SAMSS-048
Valve Inspection and Testing Requirements
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Document Responsibility: Valves Standards Committee Issue Date: 11 October 2010 Next Planned Update: 11 October 2015
04-SAMSS-042 4-Way Diverter Valve
National Association of Corrosion Engineers/International Standardization Organization NACE MR0175/ISO 15156 Petroleum and Natural Gas Industries – Materials for Use in H 2S Containing Environments in Oil and Gas Production 3.2
Industry Codes and Standards American Petroleum Institute API SPEC 6D
Specification for Pipeline Valves (Gate, Plug, Ball and Check Valves)
API STD 599
Steel Plug Valves, Flanged or Buttwelding Ends
American Society of Mechanical Engineers ASME B16.34
Valves - Flanged, Threaded and Welding End
American Society for Testing and Materials
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ASTM A193
Specification for Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature Service
ASTM A194
Specification for Carbon and Alloy Steel Nuts for Bolts for High-Pressure and High-Temperature Service
ASTM A395
Specification for Ferritic Ductile Iron Pressure Retaining Castings for Use at Elevated Temperatures
ASTM A436
Specification for Austenitic Gray Iron Castings
ASTM A439
Specification for Austenitic Ductile Iron Castings
ASTM A536
Specification for Ductile Iron Castings
General Valves shall meet the applicable requirements of 04-SAMSS-035.
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Design 5.1
Valves shall have pressure ratings in accordance with ASME B16.34.
5.2
Valve bodies shall have minimum wall thickness in accordance with API STD 599.
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Document Responsibility: Valves Standards Committee Issue Date: 11 October 2010 Next Planned Update: 11 October 2015
5.3
04-SAMSS-042 4-Way Diverter Valve
Seating segments (slips), if applicable, shall be held to the plug by tapered dove tail connections. Raising the plug when in the closed position shall cause the slips to be retracted perpendicularly from the body seating surface, thus providing clearance prior to rotation of the plug. Conversely, lowering the plug after rotation shall cause the slips to press perpendicularly against the bod y seat by this wedge action. The slips shall be replaceable after draining the valve, without removing the valve from the line. As an alternative, the plug can be of a non-expanding/retracting design (no slips), consisting of a tapered lift plug complete with one or mo re resilient seals around its seating surface. Other designs shall be evaluated and approved accordingly by the Valves Standards Committee Chairman.
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5.4
Stem sealing shall be achieved with packing as a primary seal in conjunction with O-rings as a secondary seal.
5.5
Valves shall be provided with a drain connection in the body cavity at the lowest possible location and shall be fitted with a steel NPT threaded plug.
5.6
Manual bleed to atmosphere with automatic thermal relief shall be provided for all valves.
5.7
The valves shall have tight shut off in all flow directions and between all ports. A pressure gage connected with the top body cavity shall be installed to indicate any leakage that may occur in any position of the valve and in any flow direction.
5.8
A plug position indicator shall be provided, on all valves.
5.9
Flanges shall be integral with the body.
5.10
Face-to-face dimensions shall be per Vendor's standard or as stated in the PO.
Materials 6.1
Body, plug, bonnet and lower plate shall be made of a carbon steel per API SPEC 6D, Section 3.
6.2
Machined surfaces of the plug and body bore shall be electroless nickel (ENP) plated to 75 micrometers minimum thickness. Refer to 04-SAMSS-035 for ENP quality requirements.
6.3
Seating segments (slips), if applicable, shall be made of one of the following materials: a)
Austenitic gray iron
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ASTM A436, Type 2 Page 4 of 6
Document Responsibility: Valves Standards Committee Issue Date: 11 October 2010 Next Planned Update: 11 October 2015
6.4
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04-SAMSS-042 4-Way Diverter Valve
b)
Austenitic ductile iron
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ASTM A439, Type D2
c)
Ductile iron
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ASTM A536
d)
Ductile iron
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ASTM A395
Inserts, seals and packing shall be one of the following materials or equivalent: a)
Stem packing - Chevron type Viton, or TFE with PMO-ring seals.
b)
Slip inserts and O-ring body seals - FPM.
c)
Bonnet and plate gaskets- mild steel, graphite, or spiral wound graphite filled stainless steel.
6.5
Mounting flanges for gear boxes and actuators shall be carbon steel or ductile iron.
6.6
Body, bonnet and cover bolting shall be in accordance with ASTM A193, Grade B7 for bolts and ASTM A194, Grade 2H for nuts.
6.7
Refer to 04-SAMSS-003 for additional requirements for low temperature service in the temperature range -45 to -18°C (-50 to 0°F).
6.8
When wet sour service is specified in the purchase order all parts, welds, and heat-affected zones exposed to line fluids shall meet the hardness and heat treatment requirements as specified in NACE MR0175/ISO 15156. This includes materials under overlays, platings or coatings.
Operation Unless power operators are specified in the Purchase Order, gear operators shall be provided on all valves. For gear and power operator requirements, refer to 04-SAMSS-035.
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Testing and Inspection Refer to 04-SAMSS-035 and 04-SAMSS-048.
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Marking Refer to 04-SAMSS-035.
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Shipping Refer to 04-SAMSS-035.
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Document Responsibility: Valves Standards Committee Issue Date: 11 October 2010 Next Planned Update: 11 October 2015
11 October 2010
04-SAMSS-042 4-Way Diverter Valve
Revision Summary Revised the "Next Planned Update." Reaffirmed the contents of the document, and reissued with editorial revision to reflect the changes in committee members list.
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