Product Overview
ASME B16.5 Weld Neck Flange is manufactured using a high-strength forging process, specifically designed for high-pressure and high-temperature piping connections. This weld neck flange features a unique tapered hub design that effectively disperses stress and reduces pressure concentration, thereby significantly enhancing the structural integrity of the piping system. Whether in petroleum transmission or chemical processing, the ASME B16.5 Weld Neck Flange provides a stable and reliable connection solution.
Product Parameters
|
Item |
Common Specifications |
|
|
Standard |
ASME B16.5 |
|
|
Type/Model |
Forged, Weld Neck |
|
|
Size Range |
1/2" to 24" (DN15 to DN600) |
|
|
Pressure Ratings |
Class 150, Class 300, Class 600, Class 900, Class 1500, Class 2500 |
|
|
Connection Type |
Buttwelding |
|
|
Surface treatment |
Rust preventive oil, hot-dip galvanizing (customizable upon request) |
|
Material Comparison
|
Material Category |
Representative Grades |
Cost effectiveness and application |
|
Carbon Steel |
A105N, A350 LF2, ct20 |
Suitable for standard conditions, low procurement cost, good workability. The primary choice for conventional water, oil, and gas pipelines. |
|
Stainless Steel |
304/L, 316/L, 321 |
Although initial investment is higher, it eliminates frequent replacements in corrosive environments, significantly reducing maintenance costs and downtime losses. |
|
Alloy Steel |
A182 F11/F22/F91 |
Specifically designed for high-pressure, high-temperature applications (e.g., power plants). Reduces failure rates, ensures continuous production, resulting in a short return on investment. |
Technical Diagram
ASME B16.5
Approximate weight of welding neck flanges(Kg)
|
SIZE |
Nominal Pressure |
||||||
|
DN |
NPS |
Class150 |
Class300 |
Class600 |
Class900 |
Class1500 |
Class2500 |
|
15 |
1/2" |
0.91 |
0.91 |
1.36 |
3.18 |
3.18 |
3.63 |
|
20 |
3/4" |
0.91 |
1.36 |
1.59 |
3.18 |
3.18 |
4.09 |
|
25 |
1" |
1.14 |
1.82 |
1.82 |
3.86 |
3.86 |
5.9 |
|
32 |
1-1/4" |
1.14 |
2.27 |
2.5 |
4.54 |
4.54 |
9.08 |
|
40 |
1-1/2" |
1.81 |
3.18 |
3.63 |
6.36 |
6.36 |
12.7 |
|
50 |
2" |
2.72 |
3.36 |
4.54 |
10.9 |
10.9 |
19.1 |
|
65 |
2-1/2" |
4.45 |
5.45 |
6.36 |
16.3 |
16.34 |
23.6 |
|
80 |
3" |
5.22 |
8.17 |
8.17 |
13.2 |
21.8 |
42.7 |
|
100 |
4" |
7.49 |
12.1 |
16.8 |
23.2 |
31.3 |
66.3 |
|
125 |
5" |
9.53 |
16.3 |
30.9 |
39.1 |
59.9 |
110.8 |
|
150 |
6" |
11.8 |
20.4 |
33.1 |
49.9 |
74.5 |
171.6 |
|
200 |
8" |
19.1 |
31.3 |
50.9 |
84.9 |
123.9 |
261.5 |
|
250 |
10" |
24.5 |
45.4 |
85.8 |
121.7 |
206.1 |
484.9 |
|
300 |
12" |
39.9 |
664.5 |
102.6 |
168.9 |
313.3 |
730.1 |
|
350 |
14" |
51.8 |
93.5 |
157.5 |
255.2 |
406.5 |
|
|
400 |
16" |
64.5 |
113.1 |
218.4 |
311 |
525 |
|
|
450 |
18" |
74.9 |
138.9 |
252 |
419.5 |
687.2 |
|
|
500 |
20" |
89.4 |
167.5 |
313.3 |
528.5 |
852.6 |
|
|
550 |
22" |
103.5 |
199.4 |
376.5 |
|
|
|
|
600 |
24" |
121.7 |
235.6 |
443.6 |
955.6 |
1366.8 |
|
Main Applications
Metallurgy & Mining
Used for transporting highly abrasive or high-pressure media such as slurry and high-pressure water.
Pharmaceutical & Food Processing
In environments with high cleanliness requirements, weld neck flanges made of 304/316L stainless steel are used to facilitate pipeline cleaning and aseptic transmission.
FAQ
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