Spiral pipe manufacturing method

Spiral pipe uses a strip coil as raw material, often warm extrusion molding and two-wire double-sided submerged arc welding(SAW) process automatically welded spiral seam steel pipe.

(1) raw material is strip volume, wire, and flux. going through rigorous physical and chemical testing before the input.

(2) strip head and tail docking, using single-wire or twin-wire submerged arc welding and automatic submerged arc welding rolled into the steel pipe.

(3) before forming the strip after flattening, cutting, trimming, edge planing, transportation, and to the curved side surface cleaning.

(4) electric contact pressure gauge to control the conveyor on both sides of pressing the fuel tank pressure to ensure the smooth delivery of the strip.

(5) external locus of control or internal control roll forming.

(6) the weld gap control device to meet the welding requirements to ensure that the weld gap, diameter, misalignment, and weld gap have been strictly controlled.

(7) welding and outside welding Lincoln welding machine, a single wire or twin-wire submerged arc welding, so as to obtain stable welding specifications.

(8) finished welding the weld line continuous ultrasonic injury examination was to ensure 100% of the spiral weld nondestructive testing coverage. If the defective, automatic alarm and spray the tag, production workers and so adjusting the process parameters at any time, to eliminate defects in a timely manner.

(9) air plasma cutting machine to cut the pipes into a single root.

(10) cut a single steel pipe, each batch of steel pipe should be carried out strict inspection system, check the weld mechanical properties, chemical composition, fusion status, and quality of the steel pipe surface and after NDT inspection, to ensure that the piping process qualified can formally put into production Weld.

(11) marked the site of continuous acoustic flaw detection, manual ultrasonic, and X-ray review, if there are defects after repair again after destructive testing until the confirmation of the defect has been eliminated.

(12) strip butt weld, and intersect with spiral weld small joint where the pipe all through the X-ray television or film examination.

(13) steel pipe hydrostatic test pressure radial seal. Test pressure and time by a steel pipe pressure microcomputer detection device are strictly controlled. The test parameters are automatically printed records.

(14) pipe end machining, so that the end vertical slope altercation and accurate control of the blunt edge.

Cangzhou Shenlong Pipe Manufacturing Co., Ltd. is a high-tech enterprise specializing in the manufacture and sales of straight-seam welded pipe and spiral steel pipe. The main products of the company are oil and gas bushing, tubing, pipeline pipe, pile pipe, structural pipe, etc., with an annual design capacity of 100,000 tons. The company's products execute API SPEC 5CT, API SPEC 5L, FM 1630, UL 852, JIS G3444, JIS G3452, ASTM A53/A53M, AS/NZS 1163, AS/NZS 1074, AS/NZS 1396, EN10217, EN10219, EN10255, and GB/T9711, GB/T3091, and other domestic and foreign standards. Products are exported to overseas markets and widely used in petroleum, natural gas, solar energy, shipbuilding, automobile, chemical, environmental protection, boiler, fire protection, water conservancy, electrical industry, machinery and equipment, steel structure, construction, and other industries.