Weld Neck Flanges
This steel weld neck flanges is circumferentially welded into the system at its neck which means that the integrity of the butt welded area can be easily examined by radiography. The bores of both pipe and flange match, which reduces turbulence and erosion inside the pipeline. The weld neck is therefore favoured in critical applications. The various types of steel weld neck flanges are:
- Weld Neck Flat Face Flanges
- Raised Face Weld Neck Flanges
| ANSI B 16.5 Class 150 | ANSI B 16.5 Class 300 | ANSI B 16.5 Class 600 |
| ANSI B 16.5 Class 900 | ANSI B 16.5 Class 1500 | ANSI B 16.5 Class 2500 |
Stainless Steel
ASTM A 182, A 240
Grade
F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L, Duplex stainless steel UNS S31803, 2205, Super Duplex stainless steel UNS S32750
Carbon Steel
ASTM A 105, ASTM A 181
Alloy Steel
ASTM A 182, GR F1, F11, F22, F5, F9, F91
Nickel Alloys
Monel 400 & 500, Inconel 600 & 625, Incolloy 800, 825, Hastelloy C22,C276
Copper Alloys
Copper, Brass & Gunmetal
Size
1/8" NB TO 48"NB.
Class
150#, 300#,400 #,600#,900#, 1500# & 2500 #.
Standard
ANSI
ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
DIN
DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673
B.S
BS4504 , BS4504, BS1560, BS10