Volume-II of IV - GAIL

MECON LIMITED
Delhi
PROCESS & PIPING
DESIGN SECTION
TECHNICAL SPECIFICATION
FOR
PLUG VALVES
TECHNICAL SPECIFICATION NO. : MEC/TS/05/62/003 REV-2 Page 2 of 13
1.0 SCOPE
This specification covers the minimum requirements for design, manufacture and supply
of carbon steel plug valves of size DN 50mm (2") and above and ANSI Class 150# thru
900# for use in onshore pipeline systems handling non sour hydrocarbons in liquid
phase or gaseous phase including Liquefied Petroleum Gas (LPG).
2.0 REFERENCE DOCUMENTS
2.1 All valves shall be manufactured and supplied in accordance with the Twenty Second
Edition, January, 2002, or the latest edition of American Petroleum Institute (API)
Specification 6D, twenty first edition, 1994 including supplement 1 & 2 thereof with
additions and modifications as indicated in the following sections of this specification.
2.2 Reference has also been made in this specification to the latest edition of the following
Codes, Standards and Specifications :
ASME B 16.5 : Pipe flanges and flanged fittings
ASME B 16.25 : Buttwelding ends
ASME B 16.34 : Valves – Flanged, threaded and welding end
ASME B16.47 : Large diameter steel flanges
ASME B 31.3 : Chemical & process plant piping system
ASME B 31.4 : Liquid transportation systems for hydrocarbons and
other liquids
ASME B 31.8 : Gas transmission and distribution piping systems
ASME Sec.VIII : Boiler and pressure vessel code
ASTM A 370 : Standard test methods and definitions for mechanical
testing of steel products
ASTM B 733 : Autocatalytic nickel phosphorous coating on metals
API 6FA : Fire test for valves
API 1104 : Welding of pipelines and related facilities
BS:6755 (Part-II) : Testing of valves – Specification for fire type - testing
requirements
MSS-SP-6 : Standard finishes for contact faces of pipe flanges and
connecting-end flanges of valves and fittings
D:\old data\FATEH\MP Region\Kailaras\Tender RFQ\Plug Valves\Plug Valves - 003 - TS-R2.doc