API SPEC 2B:2007 pdf download
API SPEC 2B:2007 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 D 1. 1, Section 6, to assure compliance with the applicable requirements of Sections 1 through 6.
7.2 WELD INSPECTION
All welds shall be visually inspected on both the inside and outside surfaces. The weld profile shall meet the requirements of AWS D1.1, Section 5.24.
7.3 NONDESTRUCTIVE EXAMINATION
100% 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 D1.I. More extensive radiographic coverage may he 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 determine 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. Imperfections which exceed the above shall he 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 hut in no case more than 1/8 in. depth. If the depth of imperfections in as-rolled plate exceeds the above limits, hut not more than 20% of the nominal thickness, welding repairs may be performed. Repair of defects deeper than 20% 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.
SRi Plate Rolling Direction Orientation
SR1.1 The orientation of the pipe axis relative to the final rolling direction of the plate from which the pipe is formed shall he longitudinal or transverse (circumferential) as indicated on the purchase order and illustrated below.
SRi .2 Pipe fabricated in accordance with this supplementary requirement shall he identified by marking “S-IL” or “S-IT” adjacent to “API 2B” as required by Section 8, Item e and Item g. See Figure A- I.
SR2 CVN Toughness Tests
Notch toughness tests shall he conducted as a requirement of the welding procedure qualification tests. The welding procedure qualification test coupon shall he welded and tested in accordance with Paragraph 5.10.1 of AWS D 1.1. Charpy V-notch test specimens shall he removed from the weld and heat affected zone in accordance with the requirements of Appendix III of AWS Dl .1. The test temperature, notch location (if different from AWS), and the minimum average energy value shall he as indicated on the purchase order. The pipe shall he 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 designated longitudinal weld shall he examined by radiography throughout its entire length. Pipe inspected in accordance with this supplementary requirement shall he identified by marking as required in Section 8, Item g.
SR4 Matching Weld CVN Toughness for Designated Plate Material
SR4.i Depending on the Strength Group and Toughness Class of the designated API or ASTM plate specification, as given in Table C2.4 of AWS DI.I, the corresponding required weld metal CVN toughness shall be as given inTable C4.1 of AWS D1.1, and the heat affected zone (HAZ)CVN toughness shall be given in Table C4.2 of AWS D.1.1.
