Name: China Carbon Steel LSAW Pipe Manufacturers, Suppliers, Factory - Shenzhoutong Steel Pipe
Brand: Shenzhoutong
SKU: 297740336

Carbon Steel LSAW Pipe

Products Description

Diameter	406mm- 1118mm (16"- 44")
Thickness	6.0-25.4mm 1/4"-1"
Standard	API,DNV,ISO,DEP,EN,ASTM,DIN,BS,JIS,GB,CSA
Length	5.8m,6m,12m,18m, ect.
Steel Grade	API 5L A-X70.

T‌he Comparison between Carbon Steel LSAW pipe and SSAW Pipes

‌Comparison Dimension‌	‌LSAW (Longitudinal Submerged Arc Welded Pipe)‌	‌SSAW (Spiral Submerged Arc Welded Pipe)‌
‌Full Name‌	Longitudinal Submerged Arc Welded Pipe	Spiral Submerged Arc Welded Pipe
‌Raw Material‌	Single thick steel plate (thickness up to 50 mm or more)	Hot-rolled steel strip (narrower width, flexible adjustment)
‌Forming Process‌	Plate pre-bent and formed via JCO/UOE method; seam runs parallel to pipe axis	Strip continuously spirally wound at an angle (typically 10°–30°); seam follows a helical path
‌Welding Method‌	Double-sided SAW, often with four-wire tandem welding; longitudinal straight seam	Double-sided SAW; continuous helical seam, 30%–100% longer than straight seam of equivalent length
‌Typical Diameter Range‌	Ф406.4 mm – Ф1422.4 mm	Ф219 mm – Ф2540 mm
‌Typical Wall Thickness Range‌	8 mm – 50 mm	6 mm – 25 mm (standard), up to 30 mm with specialized processes
‌Pressure Rating‌	High pressure (≥10 MPa); suitable for X70–X120 high-grade steels; meets Class 1–2 area safety requirements	Medium to low pressure (typically ≤10 MPa); suitable for X60–X80 grades; commonly used in Class 3–4 areas
‌Geometric Accuracy‌	High (ovality ≤0.5%D, straightness ≤1.5 mm/m); stable dimensions after expansion	Lower; weld cap control critical (≤2.5 mm); prone to "saddle" or "fishback" internal weld profiles
‌Residual Stress‌	Uniformly distributed; largely eliminated by hydraulic expansion	Complex and uneven; predominantly tensile state
‌Weld Strength Characteristics‌	Shorter weld, fewer defects, lower stress concentration; higher burst pressure than SSAW	Helical seam disperses primary stress; superior crack arrest performance; failure confined to single pitch
‌Static Burst Strength‌	Higher yield and burst pressures; optimal for high-pressure, high-stress environments	Slightly lower burst pressure; superior ductility and crack propagation resistance
‌Primary Production Standards‌	API 5L, GB/T 9711, ASTM A671, ISO 3183	API 5L, GB/T 9711, ASTM A671, ISO 3183
‌Equipment Investment‌	High (requires large JCO/UOE presses, expansion machines)	Lower (simpler coiling equipment, reduced infrastructure cost)
‌Production Efficiency‌	Lower (single-plate processing, complex)	Higher (continuous strip feeding, ideal for high-volume production)
‌Typical Application Fields‌	Mainline oil/gas pipelines, subsea pipelines, arctic regions, urban dense zones, deepwater projects, high-pressure systems	Long-distance pipelines (non-high-pressure sections), water transmission, municipal networks, heating lines
‌Coating Compatibility‌	Fully compatible with 3PE, FBE, IPN8710; strong adhesion	Compatible with major coating systems; weld cap may affect uniformity, requiring special treatment
‌Typical Project Examples‌	West-East Gas Pipeline (X70, Φ1016 mm), Nord Stream, Gulf of Mexico deepwater pipelines	West-East Gas Pipeline Line IV (Φ1219 mm, X70), Guliang–Hekou connecting line (18 m ultra-long pipes), urban water networks