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23 product categories
Line Pipe Threads
Ring and Plug Gauges
Manufacturer of Casing, Tubing or Coupling Stock - PSL 1
Manufacturer of Accessory Material - PSL1
Manufacturer of Coupling Blanks or Accessory Material from Bar - PSL 1
Manufacturer of Casing, Tubing or Coupling Stock - PSL 2
Manufacturer of Accessory Material - PSL 2
Manufacturer of Coupling Blanks or Accessory Material from Bar - PSL 2
EW Casing or Tubing (Plain End)
Seamless Casing or Tubing (Plain End)
EW Casing or Tubing (Threaded and Coupled)
Seamless Casing or Tubing (Threaded and Coupled)
Coupling Stock or Accessory Material
Casing or Tubing Pup Joints
Casing or Tubing Couplings
Processed Casing, Tubing, Coupling Stock, or Accessory Material (Plain End)
Processed Casing or Tubing (Threaded and Coupled)
About product categories and sources
Includes 324 product categories from the API Composite List search snapshot. Chinese labels are OFMP reading aids, not official API translations; original English names are retained for comparison. Product categories and certificates do not establish specific models, availability or delivery capability; confirm these with suppliers. Category snapshot: 2026-10-10
View the API category source