ASME B16.11: This is the primary standard that defines the dimensional requirements, tolerances, pressure, and other factors for socket weld fittings, including 90° elbows.
NPS Size |
A (mm) |
B (mm) |
C (mm) |
T (mm) |
L (mm) |
|---|---|---|---|---|---|
1/2 |
25 |
38 |
15 |
3.68 |
32 |
3/4 |
28 |
44 |
18 |
3.91 |
38 |
1 |
32 |
51 |
21 |
4.55 |
44 |
1-1/4 |
35 |
60 |
27 |
4.85 |
51 |
1-1/2 |
38 |
64 |
30 |
5.08 |
57 |
2 |
44 |
76 |
37 |
5.54 |
64 |
2-1/2 |
51 |
92 |
43 |
7.01 |
76 |
3 |
57 |
108 |
52 |
7.62 |
86 |
4 |
64 |
121 |
62 |
8.64 |
102 |
NPS Size |
OD (mm) |
T (mm) |
Center to End A (mm) |
|---|---|---|---|
5 |
141.3 |
7.11 |
95 |
6 |
168.3 |
8.74 |
114 |
8 |
219.1 |
10.97 |
152 |
10 |
273.1 |
12.70 |
191 |
12 |
323.9 |
12.70 |
229 |
14 |
355.6 |
12.70 |
267 |
16 |
406.4 |
12.70 |
305 |
18 |
457.0 |
12.70 |
343 |
20 |
508.0 |
12.70 |
381 |
24 |
609.6 |
12.70 |
457 |
Note:
| Material Type | ASTM Standards | Characteristic | Main Applications |
| Carbon steel | ASTM A105 | High strength, easy to process | Oil, gas, steam pipeline system |
| ASTM A106 | Heat resistant, high strength | High temperature applications | |
| Stainless Steel | ASTM A182 F304 | Good corrosion resistance, durable | Chemical, food, pharmaceutical industry |
| ASTM A182 F316 | Anti-corrosion and oxidation, good heat resistance | Highly corrosive, chemical environments | |
| ASTM A312 TP304 | Good corrosion resistance, high durability | Water, chemical, food systems | |
| ASTM A312 TP316 | Excellent corrosion resistance, good heat resistance | Chemicals, petroleum, food | |
| Alloy | ASTM A182 F11 | High heat resistance, high durability | Thermal power, chemicals, oil and gas |
| ASTM A182 F22 | High heat and pressure resistance | Thermal power plant, boiler | |
| ASTM A234 WPB | High strength, easy to process | Oil, gas, steam pipeline system | |
| ASTM A234 WP11 | High heat resistance, high durability | Chemical, thermoelectric | |
| Nickel Alloy | ASTM B366 Inconel 600 | Anti-corrosion, high heat resistance | Chemical and nuclear industry |
| ASTM B366 Hastelloy C276 | Excellent corrosion resistance | Chemical industry, highly corrosive environment | |
| Copper Alloy | ASTM B61 | Good thermal conductivity, anti-corrosion | Cooling system, sea water |
| ASTM B62 | Good electrical conductivity, corrosion resistance | Electrical and cooling industry |

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