Volume-II of IV - GAIL

Pipe Size, Out
Side Diamter-
Inches
Table-1
Type and Number of Test Specimens for
Procedure Qualification Test & Production Welds
Tensile
API
Tensile
ISO
Nick
Break
Root
Bend
Number of Specimens
Face
Bend
Side
Bend
Wall Thickness - ½ inch (12.7mm) and Under
Macro
Bend
\\Akjha\work contrac\standard TS for Pipe Line WC (Vol-II) MASTER FOLDER\02A welding onshore gas pipeline\Welding of Onshore Gas Pipelines with addendum - I 02A.doc
Hardness
Impact Total
Under 2-3/8 0 0 2 2 0 0 0 0 0 4
2-3/8 to 4- ½
incl.
Over 4-½ less
than 12.75
12- 3/4 and
over
0 0 2 2 0 0 0 0 0 4
2 0 2 2 2 0 2 2 12 24
2 2 4 4 4 0 2 2 24 44
Wall Thickness - Over ½ inch (12.7mm)
4-½ and smaller 0 2 0 0 0 2 0 0 0 4
Over 4-½ less
than
12-3/4
2 0 2 2 2 0 2 2 12 24
12-3/4 and over 2 2 4 0 0 8 2 2 24 44
14.3 Nick-Break Test
14.3.1 Preparation
Specimens for Nick-break test with notches thus worked can
break in the base metal, instead of in the fusion zone; therefore an
alternative test piece may be used after authorisation by the
COMPANY with a notch cut in the reinforcement of outside weld bead
to a maximum depth of 1.5mm measured from the surface of the weld
bead.
14.4 Macroscopic Inspection
14.4.1 Preparation
Specimens shall be taken from the positions indicated in Fig. 1 of this
specification and shall be prepared in accordance with ASTM E2 and
E3.