the choice of straight seam submerged arc welded steel pipe

For different customers, the requirements of straight seam submerged arc welded steel pipe are also in different way. There are some tips to tell you how to choose straight seam submerged arc welded pipe. Hope to help you in your oil and natural gas industry and daily life.

For high load requirements of pipeline, due to the users’ uneven gas consumption, pipeline pressure is fluctuations frequently, and the stress endured by steel pipe is very big. If choose the spiral welded pipe with many welded seam and high risk defects, the safety of pipeline operation will be not guaranteed. So, choosing LSAW pipe is the proper for you.

The pipeline crossing the earthquake fault zone or local high intensity selsmic region, because of frequent geological activities, this will produce longitudinal or axial alternating stress to the pipeline. Because spiral welded pipe has many welded seam and high risk defects, under long effect of stress, the accident probability of spiral welded pipe is greatly higher than straight seam submerged arc welded steel pipe (SSAW pipe). Therefore, in earthquake fault zone, LSAW steel pipe is the best choice for you.

For the high requirements internal and external anticorrosive coating of pipeline, straight seam submerged arc welded pipe should be adopted. Because the surplus height of seam of spiral welded pipe is generally higher than LSAW steel pipe. When the anticorrosive coating for the steel pipe internal and external, the anticorrosive materials combination to bare pipe is tighter than SSAW pipe and the anticorrosive effect is also better than SSAW steel pipe.

For important crossing projects, LSAW pipe is should be used, because the maintenance and management is more difficult than general line in the future. Therefore, it is necessary to use high performance LSAW pipes.

For the pipeline weaknesses such as roasted bend pipe, LSAW pipes should be adopted. Due to the direction of change, internal and external of roasted bend is bigger than ordinary straight pipe lines. The stress is not easy to eliminate, which is a weak link in long distance pipeline, while LSAW pipe can make up for these deficiencies.