♦Standard

API 5CT, GB, ISO11960, GOST

♦Specification range:

outer diameter: 114.3MM -508MM (4 1/2"--20")

wall thickness: 5.21mm-16.13mm (9.5PPF--133PPF)

♦Material:

H40, J55, K55, N80-1, N80-q, L80-1, L80-9cr, L80-13cr, P110, Q125, M65, C90, C95, T95, etc

♦Button type:

STC, LTC, BTC, XC and Premium connection

♦Length:

R1, R2, R3

♦Inspection:

NDT etc related rules of API 5CT and 5B

♦Type:

seamless steel tube, straight steel pipe

Technical parameters

Chemical composition requirements, weight percentage（%）

◎ a:If the product adopts oil quenching, the upper limit of carbon content of L80 steel grade can be increased to 0.50%

◎ b:If the wall thickness is less than 17.78mm, there is no lower limit for the molybdenum content of C90 steel grade 1

◎ c:If the product is oil quenched, the upper limit of carbon content of C80 steel grade can be increased to 0.55%

◎ d:If the wall thickness is less than 17.78mm, the lower limit of molybdenum content of T95 steel grade 1 can be reduced to 0.15%

NL-No limitation, the content of the elements should be reported during product analysis