Leyon steel Co., Ltd |
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ASTM Standand Stainless Steel Pipe Fitting Butt Welded Industrial Ss End Cap
1. Strict control of raw materials procurement, chemical
composition, mechanical properties of materials 100% inspection;
2. The blanking material in strict accordance with the standard or
drawing check, check mark is complete right. Under the unmarked
material can't;
3. Use cold or hot pressing processing way, don't change the
material performance, the evenness of the thickness of the
material;
4. The first cap after molding, using qualified measuring diameter,
ovality, height, thickness, etc.; Ensure that conform to the
requirements of the standard or drawing for mass production;
5. According to the requirements of the different material, heat
treatment was carried out on the tube cap to improve the mechanical
properties of the product;
6. The flat, cut head by line cutting, after cutting Angle
measurement by qualified universal Angle ruler;
7. For each tube cap, pickling, remove surface stains, scale, etc;
8. For each batch production cap for a percentage of the
UT/MT/PT/RT sampling, to ensure quality;
9. Use a magnifying glass for each cap appearance inspection, pipe
surface is smooth, no oxide coating. Scratches depth < 5% is
greater than 0.5 mm in wall thickness, can not have scar, folding,
folding, delamination,defects. Depth of more than 10% of nominal
wall thickness or greater than 1.5 mm mechanical scratches and pits
shall be removed.
10. Record each cap size measured values, traceability.
11. The size of the cap and standard: DN15 ~ DN1200, SCH5 ~ SCH160,
ASME/DIN/BS/JIS/GOST