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:
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
Grades
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
Stainless Steel
ASTM A 182, A 240
Nickel Alloys
Monel 400 & 500, Inconel 600 & 625, Incolloy 800, 825, Hastelloy C22,C276
Carbon Steel
ASTM A 105, ASTM A 181
Alloy Steel
ASTM A 182, GR F1, F11, F22, F5, F9, F91
Copper Alloys
Copper, Brass & Gunmetal
Size
18" NB TO 48"NB.
Class
150#, 300#,400 #,600#,900#, 1500# & 2500 #.
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

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:
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
Grades
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
Stainless Steel
ASTM A 182, A 240
Nickel Alloys
Monel 400 & 500, Inconel 600 & 625, Incolloy 800, 825, Hastelloy C22,C276
Carbon Steel
ASTM A 105, ASTM A 181
Alloy Steel
ASTM A 182, GR F1, F11, F22, F5, F9, F91
Copper Alloys
Copper, Brass & Gunmetal
Size
18" NB TO 48"NB.
Class
150#, 300#,400 #,600#,900#, 1500# & 2500 #.
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