Dear All
It is common to see heat numbers in the MTC(Material Test Certificates). However, sometimes we also come across lot numbers and batch numbers.
Can somebody help explain the difference between the 3 heat numbers ?
regards
QW Tian
Dear Members
My specification calls for line pipe API-5L X52QS PSL2 for sour service meeting ISO 15156/NACE MR0170. Due to small quantity, my fabricator proposes to utilize ex-stock line pipe of API-5L X52Q. In order to meet API-5L X52QS, they propose to conduct additional testings in...
Dear Community
I wish to seek help from the Community regarding the SSC and HIC requirement in ISO 15156 for steel plates used for pressure vessels.
ISO 15156-2015 states the following requirement for pressure vessel steels:
"A.2 SSC-resistant carbon and low-alloy steels and the use of cast...
Dear Community
I noticed that ASTM material for piping carbon steel (CS) and low temp carbon steel (LTCS)are similar in chemical composition and manufacturing process including heat-treatment. However, LTCS has a higher toughness for impact-test at -45 deg C (or -46 deg C).
I am referring to...
Dear Community
I noticed that ASTM material for piping carbon steel (CS) and low temp carbon steel (LTCS)are similar in chemical composition and manufacturing process including heat-treatment. However, LTCS has a higher toughness for impact-test at -45 deg C (or -46 deg C).
I am referring to...
ISO 15156 Para 7.1.2 allows "The steels described or listed in A.2 are considered resistant to SSC ..." and A.2.1.3 mentions forgings ASTM A105 and wrought fittings ASTM A234 WPB and WPC to be acceptable steel grade without SSC testings so long as hardness are met.
My questions would be as...
