... Place of Origin: China (Mainland) Certification: API Surface Treatment: Painted Special Pipe: API Pipe Grade: B Application: Line pipe Technique: hot-rolled/cold drawn .Packaging & ... 24-31.75 Grade: A, B, X42, X46, X52, X60, X65, X70 Standard: API 5L, ISO3183, NACE MR0175, NACE TM0177, NACE ... As one of the major exporters of OCTG and line pipe for crude oil and natural gas delivery in China, we topped ...