Concrete Pump Elbow After surface treatment
Elbow technical requirements
1, because most of the pipe for welding, in order to improve the quality of welding, the end of the car into the groove, leaving a certain angle, with a certain edge, this requirement is also more strict, thick side, the angle of how much and deviation The scope of the provisions are provided. The surface quality and mechanical properties are basically the same as those of the tube. For easy welding, the pipe is the same as the steel of the pipe being connected.
2, that is, all the pipe fittings have to go through the surface treatment, the inner and outer surface of the oxide scale through the shot peening spray, and then coated with anti-corrosion paint. This is for export needs, Moreover, in the country is also to facilitate the transport to prevent corrosion oxidation, have to do this work.
3, is the requirements of the packaging for small pieces, such as exports, you need to do wooden box, about 1 cubic meter, the provisions of this box in the number of elbows can not be more than one ton, the standard allows suits, But the total weight is generally not more than 1 ton. For large pieces of y will be a single package, like 24 "must be a single package. The other is the packaging mark, mark is to indicate the size, steel, batch number, manufacturer's trademark, etc..
Carbon steel: ASTM / ASMEA234WPB, WPC
Alloy: ASTM / ASMEA234WP1-WP12-WP11-WP22-WP5-WP91-WP911, 15Mo315CrMoV, 35CrMoV
Stainless steel: ASTM / ASMEA403WP304-304L-304H-304LN-304N
ASTM / ASMEA403WP316-316L-316H-316LN-316N-316Ti
ASTM / ASMEA403WP321-321HASTM / ASMEA403WP347-347H
Low temperature steel: ASTM / ASMEA402WPL3-WPL6
High performance steel: ASTM / ASMEA860WPHY42-46-52-60-65-70
Cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon leaching, PVC, PPR, RFPP (reinforced polypropylene) and so on.
To the production method can be divided into push, suppression, forging, casting and so on.
To the manufacturing standard can be divided into national standard, electric standard, ship standard, standard, water standard, American standard, German standard, Japanese standard, Russian standard and so on.
According to its radius of curvature to points: can be divided into long radius elbow and short radius elbow. Long radius elbow refers to its curvature radius is equal to 1.5 times the outer diameter of the tube, that is R = 1.5D; short radius elbow that its radius of curvature is equal to the outer diameter of the tube, that is, R = 1.0D. (D is the elbow diameter, R is the radius of curvature).
According to the pressure level, there are about 17 species, and the American pipe standard is the same, there are: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, SCH100, Sch120, Sch140, Sch160, XXS; the most commonly used are STD and XS.
In accordance with the use of different shapes can be divided into: groove elbow, card sets of elbow, double elbow, flange elbow, reducer elbow, elbow elbow, internal and external teeth elbow, Elbow, collar elbow, butt welding elbow, wire elbow and so on.