The elbow has certain corrosion resistance (oxidizing acid, organic acid, cavitation), heat resistance and wear resistance. Usually used in power plants, chemicals, petroleum and other equipment materials. Chromium stainless steel stamping elbow poor weldability, should pay attention to the welding process, heat treatment conditions and the use of suitable welding electrodes. The elbow has a titanium calcium type and a low hydrogen type. Elbow Titanium calcium type can be used for AC/DC, but the welding depth is shallow, at the same time easy to red, so the stainless steel stamping elbow As far as possible DC power supply. When the stamping elbow is welded, Elbow the carbide is released after heating, and the carbide released by repeated heating will affect the performance of the elbow and reduce the corrosion resistance and mechanical properties.

In the piping system, the elbow is the pipe fittings that change the pipeline direction. Elbow materials are cast iron, stainless steel, alloy steel, can be calcined cast iron, carbon steel, Elbow non-ferrous metals and plastics.

Stainless Steel: astm/asme A403 WP 304-304l-304h-304ln-304n

Astm/asme A403 WP 316-316l-316h-316ln-316n-316ti

Astm/asme A403 WP 321-321h ASTM/ASME A403 WP 347-347h

Carbon steel: Astm/asme A234 WPB, WPC

Alloy: astm/asme A234 wp 1-wp 12-WP 11-wp 22-WP 5-wp 91-wp911

Low-Temperature steel: Astm/asme A402 WPL3-WPL 6

High-performance Steel: Astm/asme A860 wphy 42-46-52-60-65-70

Cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, Argon Luo lek, PVC, PPR, RFPP (Reinforced polypropylene) and so on.

Stainless Steel Characteristics: Strength, toughness indicators are the best of all kinds of steel, its most prominent advantages are anti-corrosion, in the chemical paper and other corrosive occasions must use stainless steel, of course, the cost is also higher. Elbow Carbon steel elbow is the elbow made of carbon. Low-carbon steel has good plasticity strength, it becomes hard after adding the right amount, and the plasticity reduces the strength. Elbow connection may need to withstand very high tensile, compressive, torsional, shear strength, carbon steel elbow is a good choice. Alloy elbow is a kind of general term of many kinds of elbows, its material is various, Elbow common has carbon steel, manganese steel, nickel and so on. Alloy elbows are widely used. The common bronze alloy elbow is more common in the general water pipe, but with the improvement of living standard, many water pipes are converted to stainless steel elbow.

Elbow is a common connection used in plumbing installation to connect the pipe corners to change the direction of the pipe.

Other Name: 90掳 elbow, right angle bend, love and bend, stamping elbow, Elbow pressing elbow, mechanism elbow, welding elbow, etc.

Use: Connect two nominal diameter of the same or different pipe, so that the pipeline for 90掳, 45掳, 180掳 and various degrees of turning.

The bending radius is less than 1.5 times times the diameter of the pipe is the elbow, more than 1.5 times times the pipe diameter belongs to the bend pipe.

Technical Requirements

1, because most of the pipe fittings for welding, in order to improve the quality of welding, the end of the Cheng Chengpo mouth, leaving a certain angle, with a certain edge, this request is also more stringent, the side of the thickness, the angle of how much and the scope of the deviation are provided. Elbow Surface quality and mechanical properties are basically the same as pipes. For easy soldering, the fittings are the same as the steel of the pipe being connected.

2, is all the pipe fittings to undergo surface treatment, the internal and external surface of the iron oxide skin through the spray shot treatment, and then coated with anti-corrosion paint. Elbow This is for export needs, moreover, in the country is also to facilitate transport to prevent corrosion and oxidation, we have to do this work.

3, is the requirements for the packaging of small pipe fittings, such as export, need to make wooden cases, about 1 cubic meters, the number of elbows in this box can not exceed a tons, the standard allows the package, that is, large sets of small, but the total weight of not more than 1 tons. For large y will be a single package, like 24鈥 must be a single package. Elbow The other is the packaging mark, marking is to indicate the size, steel number, lot numbers, manufacturers trademarks and so on.