Forming Process: Cold Pressing
This process leverages the plastic deformation property of metals. By applying pressure, it flattens microscopic convex peaks on the workpiece surface, thereby reducing surface roughness. High pressure is exerted within the mold cavity to form dense molded blanks, with techniques including surface rolling and extrusion. It is suitable for materials like polycarbonate and polypropylene. Cold pressing can effectively enhance the material's tensile strength and elastic modulus.
Size Ranges
★ Seamless Flanges (DN15 - DN600, 1/2"~24")
The outer diameter of seamless flanges generally matches that of seamless steel pipes with the corresponding nominal diameter. Specific specifications and dimensions are as follows:
|
Nominal Diameter DN |
Outer Diameter |
|
15 |
22mm |
|
20 |
27mm |
|
25 |
34mm |
|
32 |
42mm |
|
40 |
48mm |
|
50 |
60mm |
|
65 |
76mm (or 73mm) |
|
80 |
89mm |
|
100 |
114mm |
|
125 |
140mm |
|
150 |
168mm |
|
200 |
219mm |
|
250 |
273mm |
|
300 |
324mm |
|
350 |
360mm |
|
400 |
406mm |
|
450 |
457mm |
|
500 |
508mm |
|
600 |
610mm |
The wall thickness of seamless flanges varies based on application scenarios and pressure requirements, typically ranging from 3 to 30mm. Models are classified by material (e.g., carbon steel, stainless steel), connection methods (e.g., welding), and implementation standards (e.g., GB/T 12459).
★ Welded Flanges (DN15 - DN1200, 1/2"~48")
The outer diameter of welded flanges is usually consistent with that of steel pipes with the corresponding nominal diameter. Specific specifications and dimensions are as follows:
|
Nominal Diameter DN |
Outer Diameter |
|
15 |
21.3mm |
|
20 |
26.9mm |
|
25 |
33.7mm |
|
32 |
42mm |
|
40 |
48.3mm |
|
50 |
60mm |
|
65 |
76.1mm |
|
80 |
88.9mm |
|
100 |
114.3mm |
|
125 |
140mm |
|
150 |
168.3mm |
|
200 |
219.1mm |
|
250 |
273mm |
|
300 |
324mm |
|
350 |
360mm |
|
400 |
406mm |
|
450 |
457mm |
|
500 |
508mm |
|
600 |
610mm |
|
800 |
813mm |
|
1000 |
1016mm |
|
1200 |
1219mm or 1220mm* |
*Note: Slight variations may occur due to different standards.
The wall thickness of welded flanges typically ranges from 2 to 20mm, varying with application scenarios and pressure requirements. Models are classified by material (e.g., carbon steel, stainless steel, alloy steel, titanium alloy), connection method (mainly welding), and implementation standards (e.g., GB/T 12459, GB/T 13401, HG/T 3651, ASME B16.9).
Manufacturing Standards
National standards: GB/T 12459, GB/T 13401, HG/T 21635, HG/T 21631
American standards: ASME/ANSI B16.9, MSS SP43
Japanese standards: JIS B 2311/2220
German standards: DIN 2605/2616/2615/2617
Russian standards: GOST 17375/17376
Custom processing based on non-standard drawings is also available.
Pressure Rating
SCH5S - SCH160; XXS
Material Options
- Stainless steel: OCr18Ni9, 0Cr18Ni9Ti, 1Cr18Ni9Ti; 304, 304L, 316, 316L, 316Ti, 317, 317L, 321, 321H; 1.4301, 1.4306, 1.4401, 1.4435, 1.4571, 1.4436, 1.4438, 1.4541; 08X18H10 (0X18H10), 03X18H11 (000X18H11), 03X17H14M2 (000X17H13M2), 08X18H10T (0X18H10T), etc.
- Duplex stainless steel: ASTM A815 - S31803, S32205, S32750, S32760
- Super stainless steel: ASTM 904L, B366 - N08904, A403 - WP317, 317L, 254SMO (UNS S31254)
Hot Tags: duplex 2205 stub end in short pattern, China duplex 2205 stub end in short pattern manufacturers, suppliers, factory, Steel B16 9 stub ends, stub ends, Duplex 2205 Stub End in Short Pattern, Long pattern stub end, Stainless Steel Stub Ends, short pattern stub end
