US 11,788,951 B2
Testing method to evaluate cold forming effects on carbon steel susceptibility to hydrogen induced cracking (HIC)
Saad Al-Muaili, Dhahran (SA); Khalid Ali Babakri, Dhahran (SA); and Mohammed Al-Anezi, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Mar. 19, 2021, as Appl. No. 17/207,283.
Prior Publication US 2022/0299424 A1, Sep. 22, 2022
Int. Cl. G01N 17/00 (2006.01); G01N 3/20 (2006.01); G01N 33/2045 (2019.01)
CPC G01N 17/006 (2013.01) [G01N 3/20 (2013.01); G01N 2203/0023 (2013.01); G01N 2203/0066 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for performing a standardized hydrogen induced cracking (HIC) test on a HIC resistant material for sour service application, the method comprising:
extracting a HIC sample from a HIC resistant material candidate;
performing a standardized HIC test on the HIC sample;
calculating respective values of a plurality of predetermined HIC resistance criteria for the HIC sample subsequent to the standardized HIC test on the HIC sample;
determining whether the calculated respective values of the plurality of predetermined HIC resistance criteria for the HIC sample are not greater than corresponding predetermined maximum threshold values;
qualifying the HIC resistant material candidate for a guided bend process in response to determining that the calculated respective values of the plurality of predetermined HIC resistance criteria for the HIC sample are not greater than the corresponding predetermined maximum threshold values;
performing the guided bend process on the qualified HIC resistant material by supporting a plate specimen obtained from the qualified HIC resistant material on a guided bend system and applying force with male and female dies of the guided bend system to develop a predetermined U-shaped bent portion in the plate specimen;
extracting a SOHIC sample from the U-shaped bent portion in the plate specimen;
performing the standardized HIC test on the SOHIC sample;
calculating a value of at least one predetermined SOHIC resistance criteria for the SOHIC sample subsequent to the standardized HIC test on the SOHIC sample;
determining whether the calculated value of the at least one predetermined SOHIC resistance criteria for the SOHIC sample is not greater than a corresponding predetermined maximum threshold value; and
validating the qualified HIC resistant material for manufacturing a sour service component in response to determining that the calculated value of the at least one predetermined SOHIC resistance criteria for the SOHIC sample is not greater than the corresponding predetermined maximum threshold value.