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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.

Please send your inquiry by   sales@sunnysteel.com

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Description

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.

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.

Spiral Submerged-arc Welded steel pipe technological process

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.

Thermatool designs and manufactures Spiral Seam Annealing systems for producers of SAW (submerged arc welded) API line pipe.

Offering all the basic features and benefits of Thermatool seam annealing systems designed for operation on longitudinally welded API pipe, Thermatool Spiral Seam Annealing systems, however, require the installation of specially “shaped” inductors.

These are custom designed on CAD systems in order to precisely follow the helix angle for a specific pipe diameter.

ssaw pipe process

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.

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.

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