SSAW Steel Pipe

SSAW steel pipes are made from hot-rolled coils, formed into a spiral shape at room temperature, and then welded using an automatic double-sided submerged arc welding process.

Hunan Standard Steel Co., Ltd. (HSCO) has 12 modern SSAW steel pipe production lines, capable of producing a full range of products with outer diameters from 219mm to 3620mm, wall thicknesses from 5.0mm to 25.4mm, and steel grades from L245 to X80 (Grade B to X80).

The production lines are equipped with two specialized production lines: one for producing spiral submerged arc welded steel pipes (SSAW) and the other for producing straight seam submerged arc welded steel pipes (LSAW), meeting the diverse needs of different projects for steel pipe types.

The production process of SSAW steel pipes is as follows:

1. Coil Probe: steel coil into the production line, the first full board Ultrasonic Inspection
2. Leveling Milling: through anvil plate leveling machine so that the original curl, and then pass the two edges of steel-sided milling machine milling, so that up to the requirements of the plate width, plate edge parallel groove shape
3. Cut Type: steel production line along the outer edge of the coiled-coil tube
4. welding and cutting: the use of advanced technology for pre double submerged arc welding(dsaw) cutting inside from the foot of the welding specification welded steel pipe welded outside use, etc.
5. Visual inspection: some basic parameters by a professional technician check
6. ultrasonic flaw: the inner and outer sides of the base metal and weld seam 100% inspection
7. X-ray detection: internal and external welds 100% X-ray television industry checks, the use of image processing system ensures detection sensitivity
8. Pressure test: hydrostatic testing machine by-root test steel pipe up to the standard requirements to ensure that the test pressure
9. Chamfer level: steel pipe inspection pipe end processing, up to the requirements of the pipe end beveling size
10. Check: X-rays and then subjected to ultrasonic testing and magnetic particle inspection conducted pipe end, check whether the deposit welding problems and defects in the pipe ends.
11. Oiled Marking: Qualified oiled steel pipe corrosion and in accordance with user requirements for marking.