American standard pipe cap

American Standard cap is the petroleum chemical industry, atomic energy and important component of food industry pharmaceutical many pressure vessel equipment indispensable.

The American Standard cap is a pressure vessel on the cover, is one of the main pressure parts of pressure vessel. The effect is sealed. First, the upper and lower bottom of the tank shaped pressure vessel is made, and the two is the end of the pipe, and is not ready to extend further, so that a tube is sealed with a head in the form of welding. The effect of heads and similar products have a blind plate and the cap, but the two products can be removed. The head is welded and can not be disassembled again. The fittings have pressure vessel, pipe, flange, elbow, three pass, four pass and other products.

The American Standard cap quality is directly related to the long-term safe operation of pressure vessels.

American Standard cap defects and Solutions

(1) deformation: due to the large thickness of the wafer and the actual thickness of the joint itself is not uniform, stamping punching force uneven or heat treatment, uneven heat and cause.

The solution can be heated by using the principle of thermal expansion and contraction, and then the cooling head can be cooled quickly or modified by spinning.

(2) scratch: mainly caused by improper operation in the process of handling. For example: hook scratches, forklift scratches.

Solution: first of all, in the hook and forklift and head contact surface pad protection film, after scratches, grinding, serious repair welding, scratch area more than 25% to the overall processing.

(3) the thinning rate: forming head thickness uniformity can avoid stress concentration, increase the head use cycle, according to the manufacturing process to determine the processing margin, to ensure that the nominal thickness minus plate negative deviation of convex head and heat drum section thickness after forming the parts not less than.

(4): pitting pitting phenomenon may be due to the surface of the plate itself is pitted, there may be pressure in the drum, stamping, spinning processes, die processing caused by unclean.

Solution: the pitting phenomenon is lighter, can use the grinding process, more than 0.2mm to repair welding, after welding, grinding quickly.

(5) orange peel phenomenon: most of the orange peel phenomenon for the plate itself has stratification phenomenon, but the naked eye is not observed, only in stamping, press drum process, orange peel phenomenon can be found.

Solution: relatively shallow orange peel phenomenon, can be polished by fine grinding clean, relatively deep, you need to repair welding, repair welding after grinding.

(6) drum package: due to the blank pressing edge force is too small, it may also be caused by uneven thickness of the material.

Solution: the use of professional drum package machine, can not be amended, need to use spinning correction, point by point correction.