API SPEC 2B:2001 pdf download
API SPEC 2B:2001 pdf download.Specification for the Fabrication of Structural Steel Pipe.
7 Inspection and Repair
7.1 INSPECTION
Fabrication and verification inspection shall be conducted in accordance with the requirements of AWS DII. Section 6. to assure compliance with the applicable requirements of Sections I through 6.
7.2 WELD INSPECTION
All welds shall he visually inspected on both the inside and outside surfaces. The weld profile shall meet the requirements of AWS, 1. Section 5.24.
7.3 NONDESTRUCTiVE EXAMINATION
lX)°/u of each girth weld and spot testing amounting to 10% of each longitudinal weld (including the extreme ends) shall he examined by radiographic or ultrasonic inspection in accordance with the requirements of Section 6 and Part E with Paragraph 6.12.3 and Part F with Paragraph 6.13.3.1 of AWS Dl.l. More extensive radiographic coverage may be obtained, if desired, by specification of Supplementary Requirement SR3. The fabricator shall be responsible for conducting all radiographic examinations.
7.4 REPAIR OF BASE METAL IMPERFECTIONS
Imperfections detected in the base metal shall be explored to deemiine the extent of each. Imperfections in the finished tube no deeper than 5% of the specified nominal wall thickness and mechanical marks no deeper than 5% of the nominal wall thickness or 1/16 in. in depth need not be removed. Imperfixtions which exceed the above shall be ground to sound metal. The excavation area shall be faired. and the thickness in the ground area shall not be reduced more than 7% of the nominal thickness but in no case more than fx in. depth. If the depth of imperfections in as-rolled plate exceeds the above limits, but not more than 20% of the nominal thickness, welding repairs may be performed. Repair of defects deeper than 20U/0 of the nominal wall thickness or repair of defects with a length and/or width more than 20% of the nominal diameter shall not be permitted. Tuhulars made from other than as-rolled plate shall not be repaired by welding unless specifically approved by the purchaser.
Introduction
When specified on the purchase order, the following supplementary requirements shall apply:
SRi Plate Rolling Direction Orientation
SR1.1 The orientation of the pipe axis relative to the tinal rolling direction of the plate from which the pipe is formed shall be longitudinal or transverse (circumferential) as mdicated on the purchase order and illustrated below.
SRi .2 Pipe fabricated in accordance with this supplementary requirement shall be identified by marking “S-IL” or “S-IT’ a accnt to “API 2W’ as required by Section 8, kent e and Item g. Sec Figure A-I.
SR2 CVN Toughness Tests
Notch toughness tests shall be conducted as a requirement of the welding procedure qualification tests. The welding procedure qualification test coupon shall be welded and tested in accordance with Paragraph 5. 10. I of AWS 1)1 .1. Charpy V-notch test specimens shill be removed from the weld and heat affected ione in accordance with the requirements of Appendix Ill of AWS 1)1.1. The test temperature, notch location (if difterent from AWS). and the minimum average energy value shall be as indicated on the purchase order. The pipe shall be identified by marking as required in Section 8. Item g.
SR3 100 Percent Radiographic Examination
In addition to 100% radiography of the girth welds specified by 7.3. each designaed longitudinal weld shall be examined by radiography throughout its entire length. Pipe inspected in accordance with this supplementary requirement shall be identified by marking as required in Section 8, Item g.
