Longitudinal Welded Steel Pipe
Longitudinal Welded Steel Pipe,also known as LSAW pipe(Longitudinal Submerged Arc Welded Pipe),is a type of welded steel pipe produced by forming a single steel plate into a cylindrical shape and welding along a straight longitudinal seam.I...
Longitudinal Welded Steel Pipe,also known as LSAW pipe(Longitudinal Submerged Arc Welded Pipe),is a type of welded steel pipe produced by forming a single steel plate into a cylindrical shape and welding along a straight longitudinal seam.It is widely recognized for its high dimensional accuracy,stable weld performance,and strong pressure resistance,making it ideal for large-diameter and thick-wall applications.
Production&Features
Manufactured from heavy-gauge hot-rolled steel plates through cold forming or hot expanding,with submerged arc welding along the longitudinal direction.
Straight weld seam ensures uniform stress distribution and high overall rigidity.
Excellent roundness,straightness,and wall thickness consistency.
Undergoes strict non-destructive testing(UT,RT,MT),hydrostatic pressure testing,and mechanical property testing to ensure quality.
Materials&Standards
Common materials include Q235B,Q355B,16Mn,ASTM A53,API 5L Grade B,X42–X80,and other carbon or alloy steels.
It complies with international standards such as API 5L,ASTM A252,EN 10219,GB/T 9711,and GB/T 3091.
Main Applications
Oil,natural gas,and water transmission pipelines
Urban water supply,drainage,and heating engineering
Bridge pile foundations,structural columns,and building infrastructure
Marine engineering,port facilities,and offshore structures
Industrial fluid pipelines and high-pressure mechanical equipment
Advantages
Suitable for large diameter and thick wall specifications.
High structural strength and reliable pressure-bearing capacity.
Stable welding quality and low defect rate.
Flexible customization in diameter,wall thickness,and length.
Cost-effective compared with seamless pipes for large-size projects.
