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Q Seamless vs. ERW vs. LSAW – How should I Choose?
A The choice depends on your project's pressure and size requirements and cost considerations. Seamless pipes typically available up to 24 inches, but economically found up to 16 inches, ideal for high-pressure applications and critical service, yet is the most expensive option. ERW pipes typically available from 4 inches to 24 inches, is most cost-effective option for medium diameters pipes with good lead time. LSAW pipe typically available from 16 inches to 60 inches+, can be engineered to match the parent metal exactly, excellent for sour service, arctic conditions, and dynamic loading.
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Q Why is line pipe coated?
A Coatings serve two main purposes, external coating is the shield against the environment, protecting the pipe from corrosion caused by soil and moisture (e.g., FBE, 3LPE, 3LPP, or Coal Tar Enamel); internal coating is the efficiency and purity factor, reducing friction (improving flow efficiency) and protect against internal corrosion or erosion.
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Q What are the end finish options for line pipe?
A Once a pipe is manufactured and coated, the ends must be prepared to allow for fast, safe, and reliable welding in the field, we supply standard end finish options for line pipe, ranging from standard to highly specialized, including plain ends (PE), pipe is cut straight, square to the axis; beveled ends (BE), pipe is machined to a specific angle; threaded ends (T&C), threads are cut onto the outside (or inside) of the pipe ends.
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Q What grade, standard and dimensions of line pipe do you stock?
A We specialized in API 5L line pipes, and our inventory for line pipe cover Gr. B, X42, X52, X60, x65, X70 and X80, NPS 1/8"–44" (OD 10.3–1 219 mm) with wall SCH 10–XXS (1.2–25.4 mm); lengths SRL, DRL or cut-to-length.
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Q What are the product specification level of API 5L pipeline pipes?
A API 5L is the most widely used international standard for line pipe, specifies the technical delivery conditions for seamless and welded steel pipes. It defines requirements for two product specification levels: PSL1 (standard quality) and PSL2 (Enhanced Quality). PSL 2 has stricter requirements for chemical composition, mechanical properties, and mandatory testing. It is the preferred choice for most modern pipeline projects, especially for sour service, offshore, and high-pressure applications
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Q What is Line Pipe? What are the main standards for Line Pipe?
A Line pipe is steel pipe specifically manufactured for the transportation of oil, natural gas, water, and other fluids over long distances through pipeline systems, available in seamless and welded types (ERW, LSAW, SSAW). The main standards for line pipe are API 5L, ISO 3183, and GB/T 9711.
