Volume-II of IV - GAIL

MECON LIMITED
REGD. OFF RANCHI
PROCESS & PIPING
DESIGN SECTION
NEW DELHI
STANDARD SPECIFICATION
QUICK OPENING END CLOSURE
TECHNICAL SPECIFICATION NO. : MEC/S/05/62/013 REV-0 Page 2 of 7
1.0 SCOPE
D:\TS\QOEC - 013 - TS.doc
This specification covers the minimum requirements for design and manufacture of quick
opening end closures to be installed at various blow-down points of the pipeline handling
Natural Gas. This specification does not cover quick opening end closures for sour
hydrocarbons service as defined in NACE standard MR0175-98.
2.0 REFERENCE DOCUMENTS
3.0 MATERIALS
Reference has been made in this specification to the latest edition of the following
codes, standards and specification :
a) ANSI B 31.8 : Gas Transmission and Distribution Piping Systems
b) ANSI B 16.25 : Butt - Welding Ends
c) ASME Sec. VIII : Boiler and Pressure Vessels Code Rules for the
Construction of Pressure vessels
d) ASME Sec. IX : Qualification standard for Welding and Brazing
procedures, welders, brazers and welding and
brazing operators.
e) API 6H : Specification on End closures, Connectors and
Swivels
f) API 1104 : Specification for Welding Pipeline and Related
Facilities
g) SSPC-VIS-1 : Steel Structures Painting Council
In case of conflict between the requirement of this specification and the requirements of
above referred documents, the requirements of this specification shall govern.
3.1 Material used in the manufacture of pressure containing parts of quick opening endclosure
shall be fully killed carbon steel, forged construction. In addition, the material
shall also meet the requirements specified herein.
The minimum SMYS of the material of pressure containing part of the closure shall be
35,000 psi.