Product Description

Spiral steel pipe is a spiral seam steel pipe made of strip steel coil as raw material, often warm extruded and welded by automatic double wire double-sided submerged arc welding process. The spiral steel pipe sends the strip steel to the welding pipe unit, and the strip steel is rolled by multiple rolls. The strip steel is gradually rolled up to form a circular tube blank with an open gap. Adjust the reduction of the extrusion roll to control the weld gap at 1~3mm, and make both ends of the weld crater flush.


PRODUCT PARAMETER


Product Name   Spiral Welded Pipe
Standard

API5L, ASTM A106 Gr.B, ASTM A53 Gr.B, ASTM A270, ASTM A249,

 ASTM A511,ASTM A778 ,ASTM A312,ASTM A358,ASTM A409,ASTM A213,ASTM

A790,ASTM A268,ASTM A269,ASTM A554,ASTM B338,ASTM B673,

ASTM B674,ASTM B677,ASTM B675, ASTM B676, ASTM B690,ASTM A928,ASME

B36.19,ASMEB36.10,ASTMA179/A192/A213/A210/370WP91,WP11,WP2

GB5310-2009,GB3087-2008,GB6479-2013,GB9948-2013,

GB/T8163-2008, GB8162-2008,GB/T17396-2009

EN10216-5,EN10217-7,DIN 17456,DIN 17458
JIS G3463,JIS G3119,JIS G3446,JIS G3218,JIS G3258,JIS G3448,JIS H4631
DEP 31,DEP 40,DEP 20,DEP 32,DNV-OS-F101
GradeQ195 = S195 / A53 Grade A
Q235 = S235 / A53 Grade B / A500 Grade A / STK400 / SS400 / ST42.2
Q345 = S355JR / A500 Grade B Grade C
Length5.8~12.0 m or as customized
Surface TreatmentPrime quality (bared, oiled, color paint, 3LPE, or other anti-corrosive treatment)
InspectionWith Chemical Composition and Mechanical Properties Analysis;
Dimensional and Visual Inspection, also with Nondestructive Inspection.
 

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Advantages of spiral welded pipe:


(1) Steel pipes of different diameters can be produced using strip steel of the same width, and

steel pipes of large diameter can be produced from narrow strip steel.

(2) Under the same pressure conditions, the stress of the

spiral welded seam is smaller than that of the straight seam, which is 75% to 90% of that of the straight seam welded pipe, so it can withstand greater pressure. Compared with the straight seam welded pipe of the same outer diameter, the wall thickness can be reduced by 10% to 25% under the same pressure.

(3) The size is accurate, the general diameter tolerance does not exceed 0.12%, the deflection is less than 1/2000, and the ovality is less than 1%. Generally, the sizing and straightening process can be omitted.

(4) Continuous production is possible. In theory, long steel pipes can be produced, with small head and tail loss, and can

increase the metal utilization rate by 6% to 8%.

(5) The equipment is light in weight and low initial investment. It can be made into a trailer-type mobile unit to directly produce welded pipes at the construction site where the pipeline is laid.


COMPANY PROFILE


Dongte Industry Co., Ltd. is a professional metal raw material production and export enterprise, located in Shandong Province, with convenient sea, road, train and air transportation, north to Tianjin port, east to Qingdao port, south to Shanghai port, The main products are stainless steel plate/coil/pipe, carbon steel plate/coil/pipe, galvanized steel coil, galvanized steel coil, round rod, screw steel, roofing board, PPGI, PPGL and other structural steel and accessories.


Products are exported to South Korea, Thailand, Dubai, Singapore, Egypt, Nigeria, South Africa, Austria, Germany, Poland, France, the United States, Mexico, Brazil and other countries and regions.


With high quality products, preferential prices, timely service as the basis, we strictly abide by the "win-win" principle and every customer cooperation. If you have any questions or purchases please do not hesitate to contact us.


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We accept formal third-party testing institutions for testing, we can also send samples to you free of charge, customer satisfaction shopping experience is always our pursuit

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