Annexure To SOW 3 STD Specification For Welding and NDT Piping
Annexure To SOW 3 STD Specification For Welding and NDT Piping
Annexure To SOW 3 STD Specification For Welding and NDT Piping
STANDARD SPECIFICATION
FOR WELDING & NDT -PIPING
PIPING
ONSH ORE STANDARD 04 - SP - 05 REV
ENGINEERING SPECIFICATION
SERVICES FOR
NEW DELH I WELDING & NDT-PIPING Page No: 2 of 15 A
1.0 SCOPE
This specification modifies and/or supplements the referenced codes that apply to
all piping, pressure vessels, structural and pipeline welding. These requirements
cover welding done at supplier’s fabrication plant, Contractor’s Yard, or field
installation, either onshore or offshore.
2.0 CODE & STANDARDS
The following Codes shall be the minimum acceptable standards for welding
and inspection. The latest edition, addenda, and supplement available at the time
of bidding will be used. Any part of any other non-listed code referred to in these
listed codes as augmentation is to be considered applicable.
e). Internal weld metal projecting into the pipe on weld neck
orifice flanges shall be removed and ground smooth with the pipe.
Ultrasonic Examination:
Ultrasonic examination may be employed where the material thickness
and degree of defect are such that determination is not possible by any of
the other methods. The procedure used and criteria of acceptance shall
be based on the recommendations of ASME Boiler and Pressure Vessel
Code Section V.
The weld number shall be marked against all welds on the works. The weld
number shall be in accordance with a scheme of numbers shown on the shop
drawings. Welds shall mark their welds with their identifying number.
Tractability records shall correlate weld number with:-
a) Welder Identity Number
b) Date Welded
APPENDIX-A
HARDNESS TESTING
1. Hardness testing shall be performed along the transverse shown in Fig. 1.
2. The required hardness survey shall be tested on a suitable macro section
machined from the same welded test assembly made to determine other weld
joint properties. However, an additional bead-on-plate weld pass shall be
made on the original weld test assembly for the purpose of determining
maximum hardness at the toe of the weld. This pass shall be made wit the
lowest permissible heat input and lowest interpass temperature applicable to
the cap passes of that procedure.
3. The hardness surveys shall be prepared and tested in accordance with ASTM E
92, Standard Test Method for Vickers Hardness (Hv) of Metallic Materials,
using an applied load of 10 kgf.
PIPING
ONSH ORE STANDARD
04 - SP - 05 REV
ENGINEERING SPECIFICATION
SERVICES FOR
WELDING & NDT-PIPING Page No: 14 of 15 A
NEW DELH I
Fig.1
PIPING
ONSH ORE STANDARD
04 - SP - 05 REV
ENGINEERING SPECIFICATION
SERVICES FOR
NEW DELH I WELDING & NDT-PIPING Page No: 15 of 15 A