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API 5CT Casing and Tubing API 5CT Casing and Tubing
Apr .28.2026
The main steel grade of API 5CT: API 5CT J55, API 5CT K55, API 5CT N80, API 5CT L80, API 5CT P110. This International Standard is applicable to the following connections in accordance with ISO 10422 or API Spec 5B:
ASTM A312 TP321 Stainless Steel Seamless Pipes Specification ASTM A312 TP321 Stainless Steel Seamless Pipes Specification
Apr .23.2026
ASTM A312 TP321 Stainless Steel Seamless Pipes specification2 covers seamless, straight-seam welded, and heavily cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service.
API 5L Grade B Carbon Steel Seamless Line Pipes & Tubes API 5L Grade B Carbon Steel Seamless Line Pipes & Tubes
Apr .16.2026
  The American Petroleum Institute specification API 5L covers seamless and welded steel line pipe. This is steel pipe for pipeline transportation systems in the petroleum and natural gas industries. API 5L is suitable for conveying gas, water, and oil. Size range is limited only by manufacturer’s capabilities.
ASTM A106 Grade B Seamless Carbon Steel Pipe for High-Temperature Service ASTM A106 Grade B Seamless Carbon Steel Pipe for High-Temperature Service
Apr .14.2026
  ASTM A106 Grade B specification covers seamless carbon steel pipe for high-temperature service (Note 1) in NPS 1/8 to NPS 48 [DN 6 to DN 1200] (Note 2) inclusive, with nominal (average) wall thickness as given in ASME B36.10.