SSAW pipe

Spiral submerged arc welding(SSAW) is its forward direction and forming tube centerline hose reel molding angle (adjustable), side molding edge welding, and welding them into a spiral.

What Are the Advantages of SSAW Pipes

• SSAW steel pipe can be produced in longer length (maximum length up to 50 meters) compared to LSAW steel pipes
• Due to its spiral seam SSAW pipe has an accurate diameter accuracy and strength
• The sizes are adjustable & can be tailored to end-user requirements.

SSAW ASTM A252 pipes

ASTM A252 standard covers nominal wall cylindrical steel pipe piles in which the steel cylinder acts as a permanent load-carrying member or as a shell to form cast-in-place concrete piles.

3PE pipe

The 3PE Coating Steel Pipe enjoys good impact resistance, abrasive resistance, shock resistance, acid resistance, high quality and long service life.

Standard

SSAW steel pipe is made up of hot-rolled coiled steel using a double-sided submerged arc welding method. The welding process allows steel pipe manufacturers to produce large-diameter steel pipes suitable for different applications.

Standard	Specification
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
BS EN10219-1	Cold formed welded structural hollow sections of non-alloy and fine grain steels - part1: Technical delivert conditions
BS EN10219-2	Cold formed welded structural hollow sections of non-alloy and fine grain steels - part2: tolerances dimmsions and sectional properties

Chemical Analysis and Mechanical Properties of SSAW Steel Pipe

Standard	Grade	Chemical Composition(max)%					Mechanical Properties(min)
		C	Si	Mn	P	S	Tensile Strength(Mpa)	Yield Strength(Mpa)
API 5L PSL1	A	0.22	-	0.9	0.03	0.03	335	335
	B	0.26	-	1.2	0.03	0.03	415	415
	X42	0.26	-	1.3	0.03	0.03	415	415
	X46	0.26	-	1.4	0.03	0.03	435	435
	X52	0.26	-	1.4	0.03	0.03	460	460
	X56	0.26	-	1.4	0.03	0.03	490	490
	X60	0.26	-	1.4	0.03	0.03	520	520
	X65	0.26	-	1.45	0.03	0.03	535	535
	X70	0.26	-	1.65	0.03	0.03	570	570
API 5L PSL2	B	0.22	0.45	1.2	0.025	0.015	415	415
	X42	0.22	0.45	1.3	0.025	0.015	415	415
	X46	0.22	0.45	1.4	0.025	0.015	435	435
	X52	0.22	0.45	1.4	0.025	0.015	460	460
	X56	0.22	0.45	1.4	0.025	0.015	490	490
	X60	0.12	0.45	1.6	0.025	0.015	520	520
	X65	0.12	0.45	1.6	0.025	0.015	535	535
	X70	0.12	0.45	1.7	0.025	0.015	570	570
	X80	0.12	0.45	1.85	0.025	0.015	625	625
ASTM A53	A	0.25	0.1	0.95	0.05	0.045	330	330
	B	0.3	0.1	1.2	0.05	0.045	415	415
ASTM A252	1	-	-	-	0.05	-	345	345
	2	-	-	-	0.05	-	414	414
	3	-	-	-	0.05	-	455	455
EN10217-1	P195TR1	0.13	0.35	0.7	0.025	0.02	320	320
	P195TR2	0.13	0.35	0.7	0.025	0.02	320	320
	P235TR1	0.16	0.35	1.2	0.025	0.02	360	360
	P235TR2	0.16	0.35	1.2	0.025	0.02	360	360
	P265TR1	0.2	0.4	1.4	0.025	0.02	410	410
	P265TR2	0.2	0.4	1.4	0.025	0.02	410	410
EN10217-2	P195GH	0.13	0.35	0.7	0.025	0.02	320	320
	P235GH	0.16	0.35	1.2	0.025	0.02	360	360
	P265GH	0.2	0.4	1.4	0.025	0.02	410	410
EN10217-5	P235GH	0.16	0.35	1.2	0.025	0.02	360	360
	P265GH	0.2	0.4	1.4	0.025	0.02	410	410
EN10219-1	S235JRH	0.17	-	1.4	0.04	0.04	360	360
	S275JOH	0.2	-	1.5	0.035	0.035	410	410
	S275J2H	0.2	-	1.5	0.03	0.03	410	410
	S355JOH	0.22	0.55	1.6	0.035	0.035	470	470
	S355J2H	0.22	0.55	1.6	0.03	0.03	470	470
	S355K2H	0.22	0.55	1.6	0.03	0.03	470	470

• Test:  Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield, strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test.
• Mill Test Certificate: EN 10204/3.1B 
• Third party inspection: SGS, BV, Lloyds etc.

Surface: Lightly oiled, Hot dip galvanized, Electro galvanized, Black, Bare, Varnish coating/Antirust oil, Protective Coatings (Coal Tar Epoxy; Fusion Bond Epoxy, 3-layers PE)

Coating Standard:

• ANSI/AWWA C104/A21.4 American National Standard for Cement-Mortar Lining for ductile-iron Pipe and Fittings for water
• DIN 30670 Polyethylene coatings of steel and fittings

Packing:  Plastic plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips, Plastic caps.

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All the pipes are produced according to

• EFW pipe vs SSAW pipe
• Advantages of spiral pipes
• SSAW pipes Tech process
• Spiral double welding pipe process
• SSAW pipes Quality Assurance
• SSAW pipes success stories
• SAW (Submerged Arc Welding) Steel Pipe
• Spiral pipe defects and disadvantages
• ASTM A252 Standard Specification
• API SPEC 5L Specification for Line Pipe
• Spiral Submerged-arc Welded Quality Assurance
• Ultrasonic Test System for SSAW Pipe Weld Seam
• Features of SSAW steel pipe production process
• Difference between ERW and SAW steel pipe
• Our technical support for ERW , SSAW & LSAW stel pipe
• Welding advantages of double submerged arc welded straight seam steel pipe
• The determination methods of deviator for spiral submerged arc welding pipe
• The difference between ERW, SSAW, LSAW
• Submerged arc welding pipe, SAW pipes
• SMAW welding(shielded metal arc welding)

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Spiral Submerged-arc Welded Quality Assurance

Spiral welded 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.

Listing some notes You must know

• Oiled marking: Steel after passing wrer oiled to prevent corrosion,and according to user requirements for making.
• Leveling Milling: The flat steel anvil machine so that the origal curl,and then thouth 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.
• Shear molding: The steel plate production line along the outer edge of the spiral curl into a tube.
• Butt cut: Double-sided submerged arc welding using advanced technology to pre-welding,internal welding,outside wilding.The welded steel pipe using a plasma-foot cut to specification length.

Note:

Welding of hot rolled steel coils takes spiral form after passing through preforming and forming rolls. Excellent exterior weld quality at high production speeds is provided by double submerged arc welding process. Manufactured pipes are cut to the desired lengths at the exit of the pipe machine. Pipe ends are beveled by means of carbide machining for accurate on-site welding.

After the pipe is conveyed to hydrostatic testing and off-line ultrasonic testing and/or real time X-ray inspection, the pipe will be subject to final inspection for the compliance to customer requirements.

Starting from incoming control up to the final inspection stage; entire process is monitored and supported by computerized system. Traceability is achieved by input controls and barcodes through entire production lines

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SSAW pipes success stories

Widely preferred longer lengths up to 18,5 m. considerably decreases the cost of pipeline construction resulting in less number of girth welds compared to shorter pipe lengths.

Spiral welded steel pipes are widely used in Oil, Natural Gas, Water and other flammable & nonflammable liquid conveyance and distribution pipelines, steel structures for construction and other general purposes by means of their wide size range.

Spiral Submerged-arc Welded steel pipe technological process

The SSAW pipe is widely used in long distance pipeline project for transmission of oil, natural gas, water as well as coal gas, and also is used in all kinds of engineering, such as chemical industry, electric power, irrigation, construction and piling etc.

Which specification of SSAW pipe we can offer?

There are nine modernized product lines in our company with the yield capacity of 1000 thousands tons of B-X80 steel pipe of φ219-φ3200mm, WT5-30mm.

There are some detailed specifications of spiral steel pipe that we produce now for our customers all over the world.

SSAW can be manufactured in large lengths and diameters.

Spiral welded tubular pipes are produced from internally and externally welded steel coils. Piling pipes can be welded with pipe shoes to enhance drivability in difficult ground conditions. SSAW are often coated for use in ports, bulkheads and jettys.

Advantages of ssaw steel pipe

(1) The use of steel strips of the same width enables the production of steel pipes of different diameters, in particular the production of large-diameter steel pipes with narrow strip steel.

(2) Under the same pressure conditions, the spiral welds are subjected to a smaller stress than the straight seams, which is 75% to 90% of the straight seam welded pipes, and can therefore withstand greater pressures. Compared with the straight welded pipe with the same outer diameter, under the same pressure, the wall thickness can be reduced by 10% to 25%.

(3) Accurate size, general diameter tolerance is not more than 0.12%, deflection is less than 1/2000, ellipticity is less than 1%, and sizing and straightening processes are generally omitted.

(4) It can be continuously produced. In theory, it can produce infinitely long steel pipes, and the loss of cutting and cutting tails is small, which can increase the metal utilization rate by 6% to 8%.

(5) Compared with the straight seam welded pipe, its operation is flexible and the adjustment of the replacement type is convenient.

(6) The equipment is light and the initial investment is small. It can be made into a trailer-type flow unit and the welded pipe can be produced directly at the construction site where the pipeline is laid.

(7) It is easy to realize mechanization and automation.

How to increase the stability of the ssaw steel pipe?

1. Small and medium-sized steel, wire rods, steel bars, medium-diameter steel pipes, steel wires and wire ropes, etc., can be stored in a well-ventilated shed, but must be lining up and down.
2. Some small steel materials, thin steel plates, steel strips, silicon steel plates, small-caliber or thin-walled steel pipes, various cold-rolled and cold-drawn steel products, and expensive, easily corroded metal products may be stored in storage.
3. The place or warehouse where spiral steel pipe products are to be kept should be located in a clean and unobstructed place, away from factories and mines that produce harmful gases or dust. Weeds and all debris should be removed from the site to keep the steel clean.
4. Large-sized steel, steel rails, insult steel, large diameter steel pipes, forgings, etc. can be stacked in the open air.
5. In the warehouse must not be stacked together with acid, alkali, salt, cement and other materials that are aggressive to steel. Different types of steel should be stacked separately to prevent confusion and prevent contact corrosion