Welded steel pipes - Hebei Haihao Group

Welded steel pipes

What are welded steel pipes?

Welded steel pipes are the steel pipes with welding seams on the surface,the production process is the steel belt or steel plate through the bending deformation into the shape of round,square,etc..and then welded by using different welding methods.Compared with seamless steel pipes,welded steel pipes have lower cost and higher production efficiency.Welded steel pipes have strong corrosion resistance in acid environment.

Types of welded steel pipes:

There are mainly three types of welded steel pipes according to production process:

ERW steel pipes

ERW steel pipes

ERW (eletrical resistance weld) is a welding method in which pipe is welded without adding filler material.ERW is either high or low frequency.Electric resistance welded steel pipe(ERW steel pipe) is manufactured by cold-forming a sheet of steel plate into a cylindrical shape.ERW has the weld seam on the inside of the pipe.

Spiral submerged arc welding (SSAW) steel pipes

Spiral submerged arc welding (SSAW) steel pipes

SSAW steel pipe(spiral submerged arc welded steel pipe) production by submerged arc method is based on using tandem welding technique for joining inside and outside coil edges, which have been trimmed and beveled by carbide milling for high quality weld structure.

Longitudinal submerged arc welded (LSAW) steel pipes

Longitudinal submerged arc welded (LSAW) steel pipes

LSAW steel pipe (longitudinally submerged arc welded steel pipe) in leaflets plate as raw material,the steel plate in the mold or molding machine pressure (volume) into using double-sided submerged arc welding and flaring from production.

Specifications of welded steel pipes:

Diameter 21.3mm-610mm 219mm-3500mm 406.4-1422.4mm
Wall Thickness 3.5mm-25mm 6mm-25mm 8mm-60mm
Length 3m-20m 5.8m-15m 3m-12m
Grades API 5L PSL1 and PSL2 Grade.B,X42,X52,X56,X60,X65,X70,ASTM A53 Gr.B,S185,S235,S275JR,S355J2H,etc
Standard API 5L,API 5CT,ASTM A53,A315,A252,A500,A795,DIN 2458,EN 10217,etc API 5L, EN10217, SY/T5040,etc API 5L,ASTM A252,ASTM A672,ISO 3183,etc
Ends plain end(PE),threaded end(TE),beveled end(BE)

Haihao Group supply&manufacture&export welded steel pipes(ERW,SSAW,LSAW),seamless steel pipes,galvanized steel pipes,casing steel pipes,precision seamless steel tubes and butt welding pipe fittings,forged pipe fittings(socket weld pipe fittings and threaded pipe fittings),forged flanges more than 30 years,we supply the piping products according to standard ANSI,ASME,ASTM,API,BS,DIN,EN,JIS,GOST,MSS,etc.If you want to know more about our piping products,please email us:sales@haihaogroup.com