Volume-II of IV - GAIL

MECON LIMITED
DELHI
D:\old data\FATEH\MP Region\Kailaras\Tender RFQ\Globe Valve\TS - Globe Valve.doc
PROCESS & PIPING
DESIGN SECTION
TECHNICAL SPECIFICATION
TITLE GLOBE VALVES SPECIFICATION NO. PAGE 8 OF 11
CAST STEEL VALVES :
MEC/TS/05/62/005 REVISION 0
1) Visual and dimensional inspection.
2) Review of material test certificates.
3) Review of radiographs/ radiographic reports of any other NDT
tests wherever applicable as per data sheet.
4) Any mandatory or supplementary test.
5) Hydrostatic test. 100% for body, 10% other test.
6) Strip check as applicable for valves.
5.4 In case of motor operated or actuator operated valves, functional/operational
checks as per the requirements of the specifications shall be made on each
valve.
6.0 RADIOGRAPHY OF CAST VALVES
6.1 Valves under critical, very highly critical, lethal and toxic services shall be
radiographed as specified in respective data sheets When specifically not
mentioned in individual data sheet, valve casting shall undergo radiographic
examination as specified hereunder :
...........................................................................................................
Material Rating Size Range Radiography
...........................................................................................................
All 150 # 24” And Below Nil
150 # 26” And Above 100%
300 # 16” And Below Nil
300 # 18” And Above 100%
600 # All Sizes 100%
& Above
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6.2 Radiography procedure, areas of casting to be radiographed shall be a per ANSI
B-16.34 and acceptance criteria shall be as per ANSI B-16.34 Annexure-B.
However for areas of casting to be radio-graphed for types of valve not covered
in ANSI B-16.34, vendor shall enclose details of areas to be radiographed in line
with ANSI B-16.34.
6.3 Random radiography wherever specified in individual data sheets, the sampling
shall be per size of the quantity ordered for each foundry.