Pipelaying Tender-VOL IV - WorleyParsons.com

REWARI KANPUR PIPELINE
PROJECT
SUBMERGED ARC WELDED
LONGITUDINAL SEAM (SAWL) LINE PIPE
DOCUMENT NUMBER
0068-00-SPC-2001
Revision 0
ANNEX G
(NORMATIVE)
PSL 2 PIPE WITH RESISTANCE TO DUCTILE FRACTURE PROPAGATION
G.1 INTRODUCTION
G.1.1
G.1.3
(New)
This annex is also applicable for liquid pipelines and liquefied petroleum gas pipeline.
Fracture Toughness Testing (Charpy V-Notch) for Pipe of Size 16 or Larger
G.1.3.1 Charpy V-notch tests shall be conducted in accordance with ASTM A 370, except as
(New) modified herein. The Manufacturer shall perform Charpy V-notch test for determining
Shear Area.
G.1.3.2 The specimen shall be full sized or largest obtainable sub size in case pipeline diameter
(New) and thickness does not permit full size specimen. The specimen shall be oriented
circumferentially from a location 90° from the weld with the axis of the notch oriented
through the pipe wall thickness as shown in Figure G-1.
G.1.3.3 Except as limited by item (c) below, any of the following Charpy V-notch specimens are
(New) permissible by agreement between the purchaser and the manufacturer.
a. Full-size specimens. Full-size specimens (10 mm by 10 mm) with or without tapered
ends may be used (see note below and Figure G-2).
b. Subsize specimens. The largest possible subsize specimen (see Table 22) with or
without tapered ends may be used. All dimensions other than specimen width are the
same as the full-size specimen. Selecting subsize specimens for pipe whose size
permits full-size specimens is also permissible by agreement between the purchaser
and the manufacturer.
c. Flattened specimen shall not be used.
(Note:
“Tapered end specimens” are designated as “tubular impact specimens containing original
OD surface” in ASTM A 370. This terminology is not used here because of possible
confusion with the flattened specimens permitted in this Annex; flattened specimens may
also contain the original OD surface (but not curvature), since machining of flattened
specimens is not required by this Annex)
G.2 ADDITIONAL INFORMATION TO BE SUPPLIED BY THE PURCHASER
This clause stands cancelled.
G.3
G.3.1
ACCEPTANCE CRITERIA
This clause of API 5L is replaced by following. The title of this clause is “Shear Area
Requirement”:
“Unless specified otherwise in the Purchase Order, the specimen shall be tested at +32F
(0C). The average shear value of the fracture appearance of the three specimens shall not
be less than 75% and the all heat average for each order, per diameter, size and grade
shall not be less than 80%.”
0068-FMT-01 Page 28 of 37
Copyright L&T-GULF Private Limited. All rights reserved.