Carbon Steel Welded Pipe

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Carbon Steel Welded Pipe

Product details

Introduction

OD	21.3mm -660mm
W.T	1mm-20mm
LENGTH	0.5mtr-22mtr
Surface	Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen Coating, Black Oil coating as per customer’s requirement
Standard	API5L, ASTM A53 GR.B, ASTM A178, ASTM A500/501, ASTM A691, ASTM A252, ASTM A672, EN 10217; API SPEC 5L ISO 3183 GB/T 9711.1 GB/T 9711.2 GB/T 9711.3
Ends	Square Ends (straight cut, saw cut) Beveled Ends

Manufacturing Process

Electric Resistance Welded (ERW) pipe is manufactured by cold forming a flat steel strip into a rounded tube and passing it through a series of forming rollers to obtain a longitudinal seam. The two edges are then simultaneously heated with a high frequency current and squeezed together to form a bond. The longitudinal ERW seam does not require filler metal.

Facilities

Introduction

Longitudinally Submerged Arc Welding Pipe is subdivided into UOE, RBE, JCOE steel pipe according to its different forming methods. Longitudinal high-frequency welded steel pipe has the characteristics of relatively simple process and fast continuous production, and has wide use in civil construction,petrochemical, light industry and other sectors. Mostly used to transport low pressure fluids or made into various engineering components and light industrial products.

When compared UOE vs JCOE pipes, LSAW steel pipe manufacturers in China can produce more sizes as:

Outside Diameter:219mm-1625mm;

Wall Thickness: 6.35 mm – 60 mm;

Length: 2 m – 18 m

From this, we can see that the LSAW pipe having superiority. PMC Steel offers LSAW pipe with high quality, competitive prices, and best service.

Standard

ASTM A53	Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
API 5L	Specification for Line Pipe(Two levels PSL 1 and PSL 2 of seamless and welded steel pipes for use in pipeline transportation systems in the petroleum and natural gas industries.)
A252	Standard Specification for Welded and Seamless Steel Pipe Piles
A500	Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes
A139	Standard Specification for Electric-Fusion (Arc)-Welded Steel Pipe (NPS 4 and Over)
A672	Specification for Electric-Fusion-Welded Steel Pipe for High-Pressure Service at Moderate Temperatures
A691	Specification for Carbon and Alloy Steel Pipe, Electric-Fusion-Welded for High-Pressure Service at High Temperatures

Types	Standard
Types	SY/T5040-2000	SY/T5037-2000	SY/T9711.1-1977	ASTM A252	AWWA C200-97	API 5L PSL1
Tube end OD deviation	±0.5%D	±0.5%D	-0.79mm～+2.38mm	<±0.1%T	<±0.1%T	±1.6mm
Wall thickness	±10.0%T	D<508mm, ±12.5%T	-8%T～+19.5%T	<-12.5%T	-8%T～+19.5%T	5.0mm<t<15.0mm, ±0.11<="" p="" style="padding: 0px; margin: 0px; user-select: text !important;">
Wall thickness	±10.0%T	D>508mm, ±10.0%T	-8%T～+19.5%T	<-12.5%T	-8%T～+19.5%T	T≥15.0mm, ±1.5mm

Manufacturing Process

Plate edge milling machine
The milling machine mills the two sides of the plate to exacting standards in order to meet width, edging and groove shape specifications.

Edge crimping machine
The crimping machine crimps the edges of the plate to form the required curvature.

Tack welding machine
The two edges of the open seam pipe are brought together by the tack welding machine. then welded by the tack welder using a metal active - gas arc welding("MAG" )process.

Forming machine
Utilizes the "JCO" process to bend and form the crimped steel plate into a steel pipe.

Interior welding machine
The interior longitudinal seam of the pipe is welded from the inside by fixing 4 welding heads while moving pipe and using submerged-arc welding process.

End facing machine
The machine levels the pipe end with rotating cutter heads to ensure that required groove and edge specifications are met.

Hydrostatic tester
Using end face sealing technology eliminates blind zones during hydrostatic testing. The tester is also equipped with automatic recording and storing functions.

Inspection

Chemical Component Analysis
Mechanical Properties – Elongation, Yield Strength, Ultimate Tensile Strength
Technical Properties – DWT Test, Impact Test, Blow Test, Flattening Test
X-ray Test
Exterior Size Inspection
Hydrostatic Test
UT Test

Introduction

SSAW steel pipe, also known as spiral submerged arc welded steel pipe, is a spiral welded steel pipe produced by double-sided submerged arc welding. Spiral welded pipes are formed using narrower sheets or hot rolled coils, which greatly reduces their production costs. The spiral welding process allows the production of large diameter pipes suitable for transporting large quantities of oil and gas.

Standard

PRODUCT	SSAW STEEL PIPE, SPRIAL STEEL PIPE, SPRIAL WELDED PIPE
STANDARD	API 5L PSL1/API 5L PSL2/EN10217/EN10219/EN10208
	/ASTM A53/ASTM A252 Grade 1/2/3, AN/NZS 1163
MATERIAL	Q235B/GR.B/X42/X56/X60/X70/X80/Grade 1/2/3, C350
OUTDIAMETER	219MM-4064MM
THICKNESS	3.2MM-40MM
SURFACE TREATME NT	VARNISH
	BARE PIPE
	BLACK PAINTING
	RED PAINTING
	3LPE
	YELLOW JACKET
	GALVANIZATION
PACKING	BREAK BULK
	BUNDLE
END TREATMENT	PLAIN END
	BEVELED END
	BSP THREAD WITH COUPLING
	NPT THREAD WITH COUPLING
	GROOVED
END PROTECTORS	PLASTIC CAPS
	STEEL PROTECTORS
MOQ	1 TON
APPLICATION	PILLING SUPPORT
	BRIDGE SUPPORT
	PUBLIC INFRASTURE SUPPORT PIPE
	DRILLING PIPE
	OIL AND GAS TRANSPORTATION
	SEWAGE TRANSMISSION
	EQUIPMENT MACHINE MADE PIPE
PRODUCTION ABILITY	600,000 TONS
BUSINESS TYPE	MANUFACTURER OF STEEL PIPE AND STEEL PIPE STOCKIEST

Manufacturing Process

SSAW steel pipe in the production process, we need to pay attention to a series of matters. Except for the following test items, according to the API standard and other relevant standards and the special requirements of some users, but also the need for steel, steel pipe and other tests Destructive tests, including physical and chemical properties of the raw materials into the plant sampling, visual inspection of 100% steel .

A. Oiled marking: steel after passing were oiled to prevent corrosion, and according to user requirements for marking.
B. Leveling Milling: The flat steel anvil machine so that the original curl, and then through the edge milling machine for two-sided steel milling, so as to meet the requirements of the plate width, plate edge parallelism and groove shape.
C. Shear molding: the steel plate production line along the outer edge of the spiral curl into a tube.
D. Butt cut: double-sided submerged arc welding using advanced technology to pre-welding, internal welding, outside welding. The welded steel pipe using a plasma-foot cut to specification length.