Read:2536 Author:admin Publish Time: 15-07-2019
As widely used in such industries as medical equipment, food, construction and kitchen utensils, stainless steel welded tube is made precisely from superlative quality material by state of the art production liner under the strict quality control and testing procedures. WAN Steel brand stainless steel welded pipe is available in extensive array of diameters and wall thicknesses and in various grades, specifications and alloys. Our stainless steel welded pipe products have excellent resistance to corrosion and can maintain strength at high temperatures. All of our stainless steel welded tube can be custom cut and polished to meet exact specifications for different customers’ requirements.
Stainless steel welded tube GB/T 12770-2002 is mainly used in machinery, cars’ accessories, bicycles, furniture, hotel and hotel decoration and other mechanical parts and structural parts. Features of stainless welded steel pipe:
Commonly used material grades of stainless steel welded tube:
Their rust resistance ability increase in sequence for above grades stainless steel welded tube. At the same time, their prices also increase in sequence. 201 grade and 304 grade stainless steel welded tubes are popular in Asia, Latin America and Africa market. 316 and 316L stainless steel welded tubes are welcomed in developed countries and markets, especially suitable for seaside region and fishing, etc.
The surface treatment of stainless steel welded pipes includes many choices:
Their rust resistance ability increase in sequence for above grades stainless steel welded tube. At the same time, their prices also increase in sequence. 201 grade and 304 grade stainless steel welded tubes are popular in Asia, Latin America and Africa market. 316 and 316L stainless steel welded tubes are welcomed in developed countries and markets, especially suitable for seaside region and fishing, etc.
The surface treatment of stainless steel welded pipes includes many choices: dull polish(sand polish), drawing, matte, mirror polishing and powder coated .
The Test and Experiment.
This test is subjected the welded part to a flattening deformation to check its strength. If the sample can withstand the specified amount of deformation without cracking, inspection is considered qualified. Completely flattened, without cracks or fractures.
This test expands the nozzle to 1.2 times of the outer diameter, and the flaring part has no crack.
The flanged specimens have no cracks in the weld or base metal
Chemical analysis shall be carried out on the chemical composition of raw materials and additive materials for stainless steel welded pipes to ensure that the chemical composition conforms to the standards.
The water pressure test is carried out on the pressure-resisting pipe one by one, under the specified pressure value and time, no leakage of the pipe is qualified.
For industrial corrosion-resistant stainless steel welded tube, the intergranular corrosion inspection of steel pipes and welding seams shall be carried out according to the standards or the corrosion methods agreed by both parties, and there shall be no intergranular corrosion tendency.
Eddy current or X-ray inspection shall be carried out on stainless steel welded tube to ensure that the welding seams and the internal structure of steel are compact without pores, inclusions and micro-cracks.
