Alloy steel elbow

Alloy steel elbow

Elbow manufacturers according to the customer needs of the model and wall thickness of the customer real-time quotation, with the rapid development of domestic foreign pipeline construction, pipeline pressure test has become an indispensable important link, before and after the pressure test, must be on each section of the pipeline through the ball sweep line, the number of times is generally ~. Turn the handwheel clockwise to close, vice versa to open. Before welding welding, in order to avoid welding deformation, the two sides of the whole elbow are aligned with the outer tile ends, and strengthened with stainless steel arc plate and keel. According to the conventional welding means, argon filling welding is required. Considering the welding cost and the large diameter of alloy steel elbow pipe, argon filling is more difficult. Considering the above factors, the welding process adopts the inner and outer welders symmetric welding at the same time, which not only solves the argon filling problem well, but also has a good shape.

According to the engineering practice, we have made a great improvement in the quality and production technology of alloy steel elbow, through the customer's detection and each department's detection of transport to the customer's location only.

Technical requirements of alloy steel elbow: because most of the pipe fittings are used for welding, in order to improve the quality of welding, the end of the car into a groove, leaving a certain Angle, with a certain edge, this requirement is also relatively strict, the thickness of the edge, how much Angle and deviation range are specified. The surface quality and mechanical properties are basically the same as the tube. For the convenience of welding, the fittings are of the same steel as the pipe to which they are connected.

That is, all pipe fittings should be surface treated, and the inner and outer surface of the oxide iron sheet is sprayed off by shot peening treatment, and then coated with anti-corrosion paint. This is for export needs, moreover, in China is also to facilitate transportation to prevent corrosion and oxidation, we need to do this work.

Is the packaging requirements for small pipe fittings, such as export, it is necessary to do wooden cases, about 1 cubic meter, the provisions of this kind of box elbow number about not more than a ton, the standard allows sets, that is, a small set, but the total weight can not exceed 1 ton. For large y, you need a single package, like 24 ", you need a single package. The other is the packaging mark, mark is to indicate the size, steel number, batch number, manufacturer and so on.