API5L Lsaw Pipe

1. Question: The field of the LSAW pipe could be used for?

1. Answer: In the construction of high-strength, high-quality long-distance oil and gas pipelines when required most of the large diameter thick-walled steel pipe LSAW pipe. According to standard API, in a large oil and gas pipelines, when through the alpine zone, the sea, the city densely populated areas such as Class 1, Class 2 areas, LSAW pipe is the only designated applicable pipe.

2. Question: Is there some advantages of LSAW pipe

2. Answer: Its wide range of product specifications, weld toughness, ductility, good uniformity and dense, with a large diameter, wall thickness, high pressure, low temperature resistance, corrosion resistance and other advantages.

3. Question: What are the main features of LSAW pipes?

3. Answer:

   a. After expanding the overall mechanical handling, pipe internal stress is small and evenly distributed, which can effectively prevent stress corrosion cracking, high dimensional accuracy, ease now

   Field welded construction.

  b. After the pre-welded using precision welding process, the welding process is stable, high weld quality.

  c. Weld easy to implement the production process and the use of non-destructive testing in the field of nondestructive testing process review.

  d. And non-straight seam welded pipe compared to weld short, small probability of weld defects.

  e. Product specifications range, can produce small-diameter, thick wall also produce large diameter, large wall thickness of the pipe.

4. Question: Is ERW same as LSAW PIPE?

4. Answer: No, ERW is - ERW - Longitudinal; LSAW is - SAW - Longitudinal; belong Longitudinal, but the two different welding processes, uses are different, and therefore not representative of Longitudinal alone.

5. Question: What are the differences between the ERW pipes and LSAW pipes.

5. Answer:

   a. Straight seam high frequency (ERW) is divided by different welding induction welding and welding exposure in two forms, the use of hot-rolled wide volume of raw materials, through pre-curved, continuous molding, welding, heat treatment, sizing, straightening, cutting, etc. processes, compared with spiral weld with a short, high dimensional accuracy, uniform thickness, good surface quality, under pressure advantages, but the drawback is only producing small diameter thin-walled tubes, easy to produce gray leaf spot weld, lack of fusion , gully erosion defects. Broader areas of application currently is city gas, crude oil and other oil products transportation.