US 11,747,241 B2
Method of testing longitudinal submerged arc welded pipe susceptibility through-thickness hydrogen cracking
Khalid Ali Babakri, Dhahran (SA); Mohammed A. Al-Anezi, Dhahran (SA); and Saad M. Al-Muaili, Dhahran (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Mar. 1, 2021, as Appl. No. 17/188,811.
Prior Publication US 2022/0276135 A1, Sep. 1, 2022
Int. Cl. G01N 1/28 (2006.01); G01N 3/08 (2006.01)
CPC G01N 1/28 (2013.01) [G01N 3/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
obtaining a metal pipe with a longitudinal submerged arc weld, an axis of the longitudinal submerged arc weld being oriented parallel to a rotationally symmetric axis of the metal pipe;
cutting a first test beam and a second test beam from the metal pipe, wherein each test beam extends on both sides of the axis of the longitudinal submerged arc weld and each test beam has a cuboid shape;
forming a double-beam assembly by clamping two spacers between the first test beam and the second test beam such that the two spacers are symmetrically disposed at an equal distance on either side the longitudinal submerged arc weld;
immersing the double-beam assembly in a liquid test solution for a predetermined period of time;
removing the double-beam assembly from the liquid test solution;
disassembling the double-beam assembly by releasing the clamping; and
examining the first test beam and the second test beam using a metallographic sectioning method.