Volume-II - GAIL
Volume-II - GAIL
Volume-II - GAIL
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1.0 SCOPE<br />
1.1 Purpose and Coverage<br />
This specification establishes the minimum requirements for the manufacture of Seamless<br />
(SMLS) , Electric Welded (EW) and Submerged Arc Welded (SAW) Steel Linepipe in<br />
accordance with the requirements of API (American Petroleum Institute) Specification 5L,<br />
Forty Third (43 rd ) Edition, March , 2004 and makes restrictive amendments / supplements to<br />
aforesaid API Spec. 5L. Unless modified (amended and / or supplemented) and referred by<br />
this Specification, the requirements of API Spec. 5L shall remain applicable.<br />
The sections, paragraphs and appendices contained herein have the same numbering as that<br />
of API Spec. 5L, in order to facilitate reference. Additional requirements, which are not<br />
specified in API Spec. 5L, have also been numbered and marked as "(New)".<br />
The coverage by this specification is limited to line pipe to be used in onshore pipelines<br />
transporting non-sour hydrocarbons in liquid or gaseous phase.<br />
The Manufacturer shall have a valid license to use API Monogram for Manufacturing of line<br />
pipe in accordance with the requirements of API Spec. 5L, Forty Third (43 rd ) Edition, March,<br />
2004.<br />
1.2 Product Specification Level (PSL)<br />
1.3 Grades<br />
Linepipe supplied to this specification shall conform to Product Specification Level PSL-2.<br />
This specification is applicable to PSL 2 line pipes of Grade B through X70.<br />
2.0 REFERENCES<br />
The latest edition of following additional references are included in this Specification :<br />
ASTM<br />
ASTM E 92 : Test Method for Vickers Hardness of Metallic Materials.<br />
ASTM E 112 : Standard Test Methods for Determining Average Grain Size<br />
BS<br />
BS 5996 : Specification for the Acceptance Level for Internal Imperfection in<br />
Steel Plate, Strip and Wide Flats, based on Ultrasonic Testing.<br />
5.0 PROCESS OF MANUFACTURE AND MATERIAL<br />
5.1 Process of Manufacture<br />
Line pipe furnished to this Specification shall be from steel produced in basic oxygen or electric<br />
arc furnace. The steel used for Manufacture of pipes shall be fully killed and fine grained with a<br />
grain size of ASTM 7 or finer as per ASTM E 112. Steel shall be made by continuous casting<br />
only.<br />
5.1.1 Seamless Process<br />
Cold sizing and straightening of Pipes is permissible provided the total strain does not exceed<br />
3.0%.<br />
<strong>GAIL</strong> (INDIA) LIMITED CARBON STEEL LINE PIPES <strong>GAIL</strong>-TS-LINEPIPE-CS<br />
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