Bend of complete sets of bending dies is adopted to bend, divided into two kinds of cold heat and hot push technology.Whether what kind of machinery, equipment and pipeline, mostly use bend, mainly used in oil, gas, fluids, etc.
Bend classification to material classification:
Carbon steel, ASTM/ASME A234 WPB, WPC
Alloy: ASTM/ASME A234 WP 11-12-1 - WP WP WP 22 - WP 5 - WP 91-35 crmov WP911, 15 mo3 15 crmov,
Stainless steel, ASTM/ASME A403 WP 304-304 - l - 304 - h - 304 ln - 304 n
ASTM/ASME A403 WP 316-316 l - 316 - h - 316 ln - 316 - n - 316 ti
ASTM/ASME A403 WP 321-321 - h ASTM/ASME A403 WP 347-347 - h
Low temperature steel, ASTM/ASME A402 WPL3 - WPL 6
High performance steel: ASTM/ASME A860 WPHY 42-46-52-60-65-65
Cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon luo drain, PVC, PPR, RFPP (reinforced polypropylene), etc.
Method to make division can be divided into pushing, pressing, forging, casting, etc.
By manufacturing standards can be divided into the national standard and electric standard, vessel standard, standard, water standard, American standard, Germany standard, Japanese standard, the standard and so on.
According to the radius of curvature points: can be divided into long radius elbow and short radius elbow.Long radius elbow refers to its radius of curvature is equal to 1.5 times the outer diameter of tube, R = 1.5 D.Short radius elbow refers to its radius of curvature is equal to the pipe diameter, R = 1.0 D.To bend diameter (D, R for the radius of curvature).5. If according to the grades of pressure points: about seventeen kinds, and American standard pipe is the same, there are: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS;Sch80, SCH100, Sch120, Sch140, Sch160, XXS;One of the most common is two kinds of STD and XS.