Welding neck flange is one of the flanges most often used in piping systems, mainly because of their high strength and corrosion resistance. The mechanical, weight, dimension, size, and physical properties of the weld neck flanges should be comprehended as it will lead to safe and trustworthy functioning. This site contains precise information regarding these types of materials, such as chemical composition, tensile strength, yield strength, corrosion resistance, temperature resistance, mass, dimensions, length, size, thermal expansion, and conductivity. Our extensive chart and table are based on data analysis of how these constraints determine hydraulic load and pressure capacity, and choosing best constituents according to specific project necessities. By utilizing our resources, you will make knowledgeable decisions about your project and unveil the true potential hidden behind weld neck flanges.
| ASME B16.5 - WN Welding Neck Flanges - 150 lbs | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal Size | Outside Diameter of Flange | Diameter Bore | Thickness of Flange | Diameter of Raised Face | Height of Raised Face | Diameter of Hub at Base | Diameter of Hub at Point of Welding | Length through Hub | Diameter of Holes | Diameter of Bolt Circle | Weight | No. of Holes | Diameter of Bolts |
| in | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | lbs | in | |
| 1/2 | 3.5 (88.9) | 0.5 (12.7) | 0.44 (11.176) | 1.38 (35.052) | 0.0625 (1.5875) | 1.19 (30.226) | 0.84 (21.336) | 1.88 (47.752) | 0.62 (15.748) | 2.38 (60.452) | 2 | 4 | 1/2 |
| 3/4 | 3.88 (98.552) | 0.75 (19.05) | 0.5 (12.7) | 1.69 (42.926) | 0.0625 (1.5875) | 1.5 (38.1) | 1.05 (26.67) | 2.06 (52.324) | 0.62 (15.748) | 2.75 (69.85) | 2 | 4 | 1/2 |
| 1 | 4.25 (107.95) | 1 (25.4) | 0.56 (14.224) | 2 (50.8) | 0.0625 (1.5875) | 1.94 (49.276) | 1.32 (33.528) | 2.19 (55.626) | 0.62 (15.748) | 3.12 (79.248) | 3 | 4 | 1/2 |
| 1+1/4 | 4.62 (117.348) | 1.25 (31.75) | 0.62 (15.748) | 2.5 (63.5) | 0.0625 (1.5875) | 2.31 (58.674) | 1.66 (42.164) | 2.25 (57.15) | 0.62 (15.748) | 3.5 (88.9) | 3 | 4 | 1/2 |
| 1+1/2 | 5 (127) | 1.5 (38.1) | 0.69 (17.526) | 2.88 (73.152) | 0.0625 (1.5875) | 2.56 (65.024) | 1.9 (48.26) | 2.44 (61.976) | 0.62 (15.748) | 3.88 (98.552) | 4 | 4 | 1/2 |
| 2 | 6 (152.4) | 2 (50.8) | 0.75 (19.05) | 3.62 (91.948) | 0.0625 (1.5875) | 3.06 (77.724) | 2.38 (60.452) | 2.5 (63.5) | 0.75 (19.05) | 4.75 (120.65) | 6 | 4 | 5/8 |
| 2+1/2 | 7 (177.8) | 2.5 (63.5) | 0.88 (22.352) | 4.12 (104.648) | 0.0625 (1.5875) | 3.56 (90.424) | 2.88 (73.152) | 2.75 (69.85) | 0.75 (19.05) | 5.5 (139.7) | 8 | 4 | 5/8 |
| 3 | 7.5 (190.5) | 3 (76.2) | 0.94 (23.876) | 5 (127) | 0.0625 (1.5875) | 4.25 (107.95) | 3.5 (88.9) | 2.75 (69.85) | 0.75 (19.05) | 6 (152.4) | 10 | 4 | 5/8 |
| 3+1/2 | 8.5 (215.9) | 3.5 (88.9) | 0.94 (23.876) | 5.5 (139.7) | 0.0625 (1.5875) | 4.81 (122.174) | 4 (101.6) | 2.81 (71.374) | 0.75 (19.05) | 7 (177.8) | 12 | 8 | 5/8 |
| 4 | 9 (228.6) | 4 (101.6) | 0.94 (23.876) | 6.19 (157.226) | 0.0625 (1.5875) | 5.31 (134.874) | 4.5 (114.3) | 3 (76.2) | 0.75 (19.05) | 7.5 (190.5) | 15 | 8 | 5/8 |
| 5 | 10 (254) | 5 (127) | 0.94 (23.876) | 7.31 (185.674) | 0.0625 (1.5875) | 6.44 (163.576) | 5.56 (141.224) | 3.5 (88.9) | 0.88 (22.352) | 8.5 (215.9) | 19 | 8 | 3/4 |
| 6 | 11 (279.4) | 6 (152.4) | 1 (25.4) | 8.5 (215.9) | 0.0625 (1.5875) | 7.56 (192.024) | 6.63 (168.402) | 3.5 (88.9) | 0.88 (22.352) | 9.5 (241.3) | 24 | 8 | 3/4 |
| 8 | 13.5 (342.9) | 8 (203.2) | 1.12 (28.448) | 10.62 (269.748) | 0.0625 (1.5875) | 9.69 (246.126) | 8.63 (219.202) | 4 (101.6) | 0.88 (22.352) | 11.75 (298.45) | 39 | 8 | 3/4 |
| 10 | 16 (406.4) | 10 (254) | 1.19 (30.226) | 12.75 (323.85) | 0.0625 (1.5875) | 12 (304.8) | 10.75 (273.05) | 4 (101.6) | 1 (25.4) | 14.25 (361.95) | 52 | 12 | 7/8 |
| 12 | 19 (482.6) | 12 (304.8) | 1.25 (31.75) | 15 (381) | 0.0625 (1.5875) | 14.38 (365.252) | 12.75 (323.85) | 4.5 (114.3) | 1 (25.4) | 17 (431.8) | 80 | 12 | 7/8 |
| 14 | 21 (533.4) | 13 (330.2) | 1.38 (35.052) | 16.25 (412.75) | 0.0625 (1.5875) | 15.75 (400.05) | 14 (355.6) | 5 (127) | 1.12 (28.448) | 18.75 (476.25) | 110 | 12 | 1 |
| 16 | 23.5 (596.9) | 15 (381) | 1.44 (36.576) | 18.5 (469.9) | 0.0625 (1.5875) | 18 (457.2) | 16 (406.4) | 5 (127) | 1.12 (28.448) | 21.25 (539.75) | 140 | 16 | 1 |
| 18 | 25 (635) | 17 (431.8) | 1.56 (39.624) | 21 (533.4) | 0.0625 (1.5875) | 19.88 (504.952) | 18 (457.2) | 5.5 (139.7) | 1.25 (31.75) | 22.75 (577.85) | 150 | 16 | 1 1/8 |
| 20 | 27.5 (698.5) | 19 (482.6) | 1.69 (42.926) | 23 (584.2) | 0.0625 (1.5875) | 22 (558.8) | 20 (508) | 5.69 (144.526) | 1.25 (31.75) | 25 (635) | 180 | 20 | 1 1/8 |
| 24 | 32 (812.8) | 23 (584.2) | 1.88 (47.752) | 27.25 (692.15) | 0.0625 (1.5875) | 26.12 (663.448) | 24 (609.6) | 6 (152.4) | 1.38 (35.052) | 29.5 (749.3) | 260 | 20 | 1 1/4 |
| ASME B16.5 - WN Welding Neck Flanges - 300 lbs | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal Size | Outside Diameter of Flange | Diameter Bore | Thickness of Flange | Diameter of Raised Face | Height of Raised Face | Diameter of Hub at Base | Diameter of Hub at Point of Welding | Length through Hub | Diameter of Holes | Diameter of Bolt Circle | Weight | No. of Holes | Diameter of Bolts |
| in | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | lbs | in | |
| 1/2 | 3.75 (95.25) | 0.5 (12.7) | 0.56 (14.224) | 1.38 (35.052) | 0.0625 (1.5875) | 1.5 (38.1) | 0.84 (21.336) | 2.06 (52.324) | 0.62 (15.748) | 2.62 (66.548) | 1/1 | 4 | 1/2 |
| 3/4 | 4.62 (117.348) | 0.75 (19.05) | 0.62 (15.748) | 1.69 (42.926) | 0.0625 (1.5875) | 1.88 (47.752) | 1.05 (26.67) | 2.25 (57.15) | 0.75 (19.05) | 3.25 (82.55) | 1/2 | 4 | 5/8 |
| 1 | 4.88 (123.952) | 1 (25.4) | 0.69 (17.526) | 2 (50.8) | 0.0625 (1.5875) | 2.12 (53.848) | 1.32 (33.528) | 2.44 (61.976) | 0.75 (19.05) | 3.5 (88.9) | 1/3 | 4 | 5/8 |
| 1 1/4 | 5.25 (133.35) | 1.25 (31.75) | 0.75 (19.05) | 2.5 (63.5) | 0.0625 (1.5875) | 2.5 (63.5) | 1.66 (42.164) | 2.56 (65.024) | 0.75 (19.05) | 3.88 (98.552) | 1/4 | 4 | 5/8 |
| 1 1/2 | 6.12 (155.448) | 1.5 (38.1) | 0.81 (20.574) | 2.88 (73.152) | 0.0625 (1.5875) | 2.75 (69.85) | 1.9 (48.26) | 2.69 (68.326) | 0.88 (22.352) | 4.5 (114.3) | 1/6 | 4 | 3/4 |
| 2 | 6.5 (165.1) | 2 (50.8) | 0.88 (22.352) | 3.62 (91.948) | 0.0625 (1.5875) | 3.31 (84.074) | 2.38 (60.452) | 2.75 (69.85) | 0.75 (19.05) | 5 (127) | 1/8 | 8 | 5/8 |
| 2 1/2 | 7.5 (190.5) | 2.5 (63.5) | 1 (25.4) | 4.12 (104.648) | 0.0625 (1.5875) | 3.94 (100.076) | 2.88 (73.152) | 3 (76.2) | 0.88 (22.352) | 5.88 (149.352) | 1/11 | 8 | 3/4 |
| 3 | 8.25 (209.55) | 3 (76.2) | 1.12 (28.448) | 5 (127) | 0.0625 (1.5875) | 4.62 (117.348) | 3.5 (88.9) | 3.12 (79.248) | 0.88 (22.352) | 6.62 (168.148) | 1/14 | 8 | 3/4 |
| 3 1/2 | 9 (228.6) | 3.5 (88.9) | 1.19 (30.226) | 5.5 (139.7) | 0.0625 (1.5875) | 5.25 (133.35) | 4 (101.6) | 3.19 (81.026) | 0.88 (22.352) | 7.25 (184.15) | 1/17 | 8 | 3/4 |
| 4 | 10 (254) | 4 (101.6) | 1.25 (31.75) | 6.19 (157.226) | 0.0625 (1.5875) | 5.75 (146.05) | 4.5 (114.3) | 3.38 (85.852) | 0.88 (22.352) | 7.88 (200.152) | 1/24 | 8 | 3/4 |
| 5 | 11 (279.4) | 5 (127) | 1.38 (35.052) | 7.31 (185.674) | 0.0625 (1.5875) | 7 (177.8) | 5.56 (141.224) | 3.88 (98.552) | 0.88 (22.352) | 9.25 (234.95) | 1/31 | 8 | 3/4 |
| 6 | 12.5 (317.5) | 6 (152.4) | 1.44 (36.576) | 8.5 (215.9) | 0.0625 (1.5875) | 8.12 (206.248) | 6.63 (168.402) | 3.88 (98.552) | 0.88 (22.352) | 10.62 (269.748) | 2/10 | 12 | 3/4 |
| 8 | 15 (381) | 8 (203.2) | 1.62 (41.148) | 10.62 (269.748) | 0.0625 (1.5875) | 10.25 (260.35) | 8.63 (219.202) | 4.38 (111.252) | 1 (25.4) | 13 (330.2) | 3/7 | 12 | 7/8 |
| 10 | 17.5 (444.5) | 10 (254) | 1.88 (47.752) | 12.75 (323.85) | 0.0625 (1.5875) | 12.62 (320.548) | 10.75 (273.05) | 4.62 (117.348) | 1.12 (28.448) | 15.25 (387.35) | 3/31 | 16 | 1 |
| 12 | 20.5 (520.7) | 12 (304.8) | 2 (50.8) | 15 (381) | 0.0625 (1.5875) | 14.75 (374.65) | 12.75 (323.85) | 5.12 (130.048) | 1.25 (31.75) | 17.75 (450.85) | 5/19 | 16 | 1 1/8 |
| 14 | 23 (584.2) | 13 (330.2) | 2.12 (53.848) | 16.25 (412.75) | 0.0625 (1.5875) | 16.75 (425.45) | 14 (355.6) | 5.62 (142.748) | 1.25 (31.75) | 20.25 (514.35) | 6/28 | 20 | 1 1/8 |
| 16 | 25.5 (647.7) | 15 (381) | 2.25 (57.15) | 18.5 (469.9) | 0.0625 (1.5875) | 19 (482.6) | 16 (406.4) | 5.75 (146.05) | 1.38 (35.052) | 22.5 (571.5) | 9/6 | 20 | 1 1/4 |
| 18 | 28 (711.2) | 17 (431.8) | 2.38 (60.452) | 21 (533.4) | 0.0625 (1.5875) | 21 (533.4) | 18 (457.2) | 6.25 (158.75) | 1.38 (35.052) | 24.75 (628.65) | 11/15 | 24 | 1 1/4 |
| 20 | 30.5 (774.7) | 19 (482.6) | 2.5 (63.5) | 23 (584.2) | 0.0625 (1.5875) | 23.12 (587.248) | 20 (508) | 6.38 (162.052) | 1.38 (35.052) | 27 (685.8) | 2/3 | 24 | 1 1/4 |
| 24 | 36 (914.4) | 23 (584.2) | 2.75 (69.85) | 27.25 (692.15) | 0.0625 (1.5875) | 27.62 (701.548) | 24 (609.6) | 6.62 (168.148) | 1.62 (41.148) | 32 (812.8) | 8/2 | 24 | 1 1/2 |
| ASME B16.5 - WN Welding Neck Flanges - 400 lbs | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal Size | Outside Diameter of Flange | Diameter Bore | Thickness of Flange | Diameter of Raised Face | Height of Raised Face | Diameter of Hub at Base | Diameter of Hub at Point of Welding | Length through Hub | Diameter of Holes | Diameter of Bolt Circle | Weight | No. of Holes | Diameter of Bolts |
| in | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | in (mm) | lbs | in | |
| 1/2 | 3.75 (95.25) | 0.55 (13.97) | 0.56 (14.224) | 1.38 (35.052) | 0.25 (6.35) | 1.5 (38.1) | 0.84 (21.336) | 2.06 (52.324) | 0.62 (15.748) | 2.62 (66.548) | 1/1 | 4 | 1/2 |
| 3/4 | 4.62 (117.348) | 0.74 (18.796) | 0.62 (15.748) | 1.69 (42.926) | 0.25 (6.35) | 1.88 (47.752) | 1.05 (26.67) | 2.25 (57.15) | 0.75 (19.05) | 3.25 (82.55) | 1/3 | 4 | 5/8 |
| 1 | 4.88 (123.952) | 0.96 (24.384) | 0.69 (17.526) | 2 (50.8) | 0.25 (6.35) | 2.12 (53.848) | 1.32 (33.528) | 2.44 (61.976) | 0.75 (19.05) | 3.5 (88.9) | 1/3 | 4 | 5/8 |
| 1 1/4 | 5.25 (133.35) | 1.275 (32.385) | 0.81 (20.574) | 2.5 (63.5) | 0.25 (6.35) | 2.5 (63.5) | 1.66 (42.164) | 2.62 (66.548) | 0.75 (19.05) | 3.88 (98.552) | 1/5 | 4 | 5/8 |
| 1 1/2 | 6.12 (155.448) | 1.5 (38.1) | 0.88 (22.352) | 2.88 (73.152) | 0.25 (6.35) | 2.75 (69.85) | 1.9 (48.26) | 2.75 (69.85) | 0.88 (22.352) | 4.5 (114.3) | 1/7 | 4 | 3/4 |
| 2 | 6.5 (165.1) | 1.94 (49.276) | 1 (25.4) | 3.62 (91.948) | 0.25 (6.35) | 3.31 (84.074) | 2.38 (60.452) | 2.88 (73.152) | 0.75 (19.05) | 5 (127) | 1/11 | 8 | 5/8 |
| 2 1/2 | 7.5 (190.5) | 2.31 (58.674) | 1.12 (28.448) | 4.12 (104.648) | 0.25 (6.35) | 3.94 (100.076) | 2.88 (73.152) | 3.12 (79.248) | 0.88 (22.352) | 5.88 (149.352) | 1/17 | 8 | 3/4 |
| 3 | 8.25 (209.55) | 2.9 (73.66) | 1.25 (31.75) | 5 (127) | 0.25 (6.35) | 4.62 (117.348) | 3.5 (88.9) | 3.25 (82.55) | 0.88 (22.352) | 6.62 (168.148) | 1/22 | 8 | 3/4 |
| 3 1/2 | 9 (228.6) | 3.35 (85.09) | 1.38 (35.052) | 5.5 (139.7) | 0.25 (6.35) | 5.25 (133.35) | 4 (101.6) | 3.38 (85.852) | 1 (25.4) | 7.25 (184.15) | 1/25 | 8 | 7/8 |
| 4 | 10 (254) | 4 (101.6) | 1.38 (35.052) | 6.19 (157.226) | 0.25 (6.35) | 5.75 (146.05) | 4.5 (114.3) | 3.5 (88.9) | 1 (25.4) | 7.88 (200.152) | 2/3 | 8 | 7/8 |
| 5 | 11 (279.4) | 5 (127) | 1.5 (38.1) | 7.31 (185.674) | 0.25 (6.35) | 7 (177.8) | 5.56 (141.224) | 4 (101.6) | 1 (25.4) | 9.25 (234.95) | 2/11 | 8 | 7/8 |
| 6 | 12.5 (317.5) | 6 (152.4) | 1.62 (41.148) | 8.5 (215.9) | 0.25 (6.35) | 8.12 (206.248) | 6.63 (168.402) | 4.06 (103.124) | 1 (25.4) | 10.62 (269.748) | 2/25 | 12 | 7/8 |
| 8 | 15 (381) | 8 (203.2) | 1.88 (47.752) | 10.62 (269.748) | 0.25 (6.35) | 10.25 (260.35) | 8.63 (219.202) | 4.62 (117.348) | 1.12 (28.448) | 13 (330.2) | 3/29 | 12 | 1 |
| 10 | 17.5 (444.5) | 10 (254) | 2.12 (53.848) | 12.75 (323.85) | 0.25 (6.35) | 12.62 (320.548) | 10.75 (273.05) | 4.88 (123.952) | 1.25 (31.75) | 15.25 (387.35) | 5/4 | 16 | 1 1/8 |
| 12 | 20.5 (520.7) | 12 (304.8) | 2.25 (57.15) | 15 (381) | 0.25 (6.35) | 14.75 (374.65) | 12.75 (323.85) | 5.38 (136.652) | 1.38 (35.052) | 17.75 (450.85) | 6/23 | 16 | 1 1/4 |
| 14 | 23 (584.2) | 13 (330.2) | 2.38 (60.452) | 16.25 (412.75) | 0.25 (6.35) | 16.75 (425.45) | 14 (355.6) | 5.88 (149.352) | 1.38 (35.052) | 20.25 (514.35) | 8/17 | 20 | 1 1/4 |
| 16 | 25.5 (647.7) | 15 (381) | 2.5 (63.5) | 18.5 (469.9) | 0.25 (6.35) | 19 (482.6) | 16 (406.4) | 6 (152.4) | 1.5 (38.1) | 22.5 (571.5) | 10/21 | 20 | 1 3/8 |
| 18 | 28 (711.2) | 17 (431.8) | 2.62 (66.548) | 21 (533.4) | 0.25 (6.35) | 21 (533.4) | 18 (457.2) | 6.5 (165.1) | 1.5 (38.1) | 24.75 (628.65) | 12/15 | 24 | 1 3/8 |
| 20 | 30.5 (774.7) | 19 (482.6) | 2.75 (69.85) | 23 (584.2) | 0.25 (6.35) | 23.12 (587.248) | 20 (508) | 6.62 (168.148) | 1.62 (41.148) | 27 (685.8) | 2/28 | 24 | 1 1/2 |
| 24 | 36 (914.4) | 23 (584.2) | 3 (76.2) | 27.25 (692.15) | 0.25 (6.35) | 27.62 (701.548) | 24 (609.6) | 6.88 (174.752) | 1.88 (47.752) | 32 (812.8) | 9/11 | 24 | 1 3/4 |
| Nominal Pipe Size | Outside Dia of Flange (O) | Thick of Flange (C) | Dia of Raised Face (R) | Dia of Hub at Base (X) | Dia of Hub at End (A) | Length thru Hub (V) | No of Holes | Dia of Holes (H) | Dia of Bolts | Dia of Bolt Circle (B) | Approx weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 95.3 | 14.2 | 35.1 | 38.1 | 21.3 | 52.3 | 4 | 15.7 | 1/2 | 66.5 | 1 |
| 3/4 | 117.3 | 15.7 | 42.9 | 47.8 | 26.7 | 57.2 | 4 | 19.1 | 5/8 | 82.6 | 2 |
| 1 | 124 | 17.5 | 50.8 | 53.8 | 33.5 | 62 | 4 | 19.1 | 5/8 | 88.9 | 2 |
| 1-1/4 | 133.4 | 20.6 | 63.5 | 63.5 | 42.2 | 66.5 | 4 | 19.1 | 5/8 | 98.6 | 3 |
| 1-1/2 | 155.4 | 22.4 | 73.2 | 69.9 | 48.3 | 69.9 | 4 | 22.4 | 3/4 | 114.3 | 4 |
| 2 | 165.1 | 25.4 | 91.9 | 84.1 | 60.5 | 73.2 | 8 | 19.1 | 5/8 | 127 | 5 |
| 2-1/2 | 190.5 | 28.4 | 104.6 | 100.1 | 73.2 | 79.2 | 8 | 22.4 | 3/4 | 149.4 | 8 |
| 3 | 209.6 | 31.8 | 127 | 117.3 | 88.9 | 82.6 | 8 | 22.4 | 3/4 | 168.1 | 10 |
| 3-1/2 | 228.6 | 35.1 | 139.7 | 133.4 | 101.6 | 85.9 | 8 | 25.4 | 7/8 | 184.2 | 12 |
| 4 | 273.1 | 38.1 | 157.2 | 152.4 | 114.3 | 101.6 | 8 | 25.4 | 7/8 | 215.9 | 19 |
| 5 | 330.2 | 44.5 | 185.7 | 189 | 141.2 | 114.3 | 8 | 28.4 | 1 | 266.7 | 31 |
| 6 | 355.6 | 47.8 | 215.9 | 222.3 | 168.4 | 117.3 | 12 | 28.4 | 1 | 292.1 | 37 |
| 8 | 419.1 | 55.6 | 269.7 | 273.1 | 219.2 | 133.4 | 12 | 31.8 | 1-1/8 | 349.3 | 54 |
| 10 | 508 | 63.5 | 323.9 | 342.9 | 273.1 | 152.4 | 16 | 35.1 | 1-1/4 | 431.8 | 86 |
| 12 | 558.8 | 66.5 | 381 | 400.1 | 323.9 | 155.4 | 20 | 35.1 | 1-1/4 | 489 | 102 |
| 14 | 603.3 | 69.9 | 412.8 | 431.8 | 355.6 | 165.1 | 20 | 38.1 | 1-3/8 | 527.1 | 127 |
| 16 | 685.8 | 76.2 | 469.9 | 495.3 | 406.4 | 177.8 | 20 | 41.1 | 1-1/2 | 603.3 | 177 |
| 18 | 743 | 82.6 | 533.4 | 546.1 | 457.2 | 184.2 | 20 | 44.5 | 1-5/8 | 654.1 | 215 |
| 20 | 812.8 | 88.9 | 584.2 | 609.6 | 508 | 190.5 | 24 | 44.5 | 1-5/8 | 723.9 | 268 |
| 24 | 939.8 | 101.6 | 692.2 | 717.6 | 609.6 | 203.2 | 24 | 50.8 | 1-7/8 | 838.2 | 376 |
| Nominal Pipe Size | Outside Dia of Flange (O) | Thick of Flange (C) | Dia of Raised Face (R) | Dia of Hub at Base (X) | Dia of Hub at End (A) | Length thru Hub (V) | No of Holes | Dia of Holes (H) | Dia of Bolts | Dia of Bolt Circle (B) | Approx weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 120.7 | 22.4 | 35.1 | 38.1 | 21.3 | 60.5 | 4 | 22.4 | 3/4 | 82.6 | 2 |
| 3/4 | 130 | 25.4 | 42.9 | 44.5 | 26.7 | 69.9 | 4 | 22.4 | 3/4 | 88.9 | 3 |
| 1 | 149.4 | 28.4 | 50.8 | 52.3 | 33.5 | 73.2 | 4 | 25.4 | 7/8 | 101.6 | 4 |
| 1-1/4 | 158.8 | 28.4 | 63.5 | 63.5 | 42.2 | 73.2 | 4 | 25.4 | 7/8 | 111.3 | 5 |
| 1-1/2 | 177.8 | 31.8 | 73.2 | 69.9 | 48.3 | 82.6 | 4 | 28.4 | 1 | 124 | 6 |
| 2 | 215.9 | 38.1 | 91.9 | 104.6 | 60.5 | 101.6 | 8 | 25.4 | 7/8 | 165.1 | 11 |
| 2-1/2 | 244.3 | 41.1 | 104.6 | 124 | 73.2 | 104.6 | 8 | 28.4 | 1 | 190.5 | 16 |
| 3 | 241.3 | 38.1 | 127 | 127 | 88.9 | 101.6 | 8 | 25.4 | 7/8 | 190.5 | 14 |
| 4 | 292.1 | 44.5 | 157.2 | 158.8 | 114.3 | 114.3 | 8 | 31.8 | 1-1/8 | 235 | 24 |
| 5 | 349.3 | 50.8 | 185.7 | 190.5 | 141.2 | 127 | 8 | 35.1 | 1-1/4 | 279.4 | 39 |
| 6 | 381 | 55.6 | 215.9 | 235 | 168.4 | 139.7 | 12 | 31.8 | 1-1/8 | 317.5 | 50 |
| 8 | 469.9 | 63.5 | 269.7 | 298.5 | 219.2 | 162.1 | 12 | 38.1 | 1-3/8 | 393.7 | 79 |
| 10 | 546.1 | 69.9 | 323.9 | 368.3 | 273.1 | 184.2 | 16 | 38.1 | 1-3/8 | 469.9 | 118 |
| 12 | 689.6 | 79.2 | 381 | 419.1 | 323.9 | 200.2 | 20 | 38.1 | 1-3/8 | 533.4 | 147 |
| 14 | 641.4 | 85.9 | 412.8 | 450.9 | 355.6 | 212.9 | 20 | 41.1 | 1-1/2 | 558.8 | 181 |
| 16 | 704.9 | 88.9 | 469.9 | 508 | 406.4 | 215.9 | 20 | 44.5 | 1-5/8 | 616 | 225 |
| 18 | 787.4 | 101.6 | 533.4 | 565.2 | 457.2 | 228.6 | 20 | 50.8 | 1-7/8 | 685.8 | 308 |
| 20 | 857.3 | 108 | 584.2 | 622.3 | 508 | 247.7 | 20 | 53.8 | 2 | 749.3 | 376 |
| 24 | 1041.3 | 139.7 | 692.2 | 749.3 | 609.6 | 292.1 | 20 | 66.5 | 2-1/2 | 901.7 | 680 |
| Nominal Pipe Size | Outside Dia of Flange (O) | Thick of Flange (C) | Dia of Raised Face (R) | Dia of Hub at Base (X) | Dia of Hub at End (A) | Length thru Hub (V) | No of Holes | Dia of Holes (H) | Dia of Bolts | Dia of Bolt Circle (B) | Approx weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 120.7 | 22.4 | 35.1 | 38.1 | 21.3 | 60.5 | 4 | 22.4 | 3/4 | 82.6 | 2 |
| 3/4 | 130 | 25.4 | 42.9 | 44.5 | 26.7 | 69.9 | 4 | 22.4 | 3/4 | 88.9 | 3 |
| 1 | 149.4 | 28.4 | 50.8 | 52.3 | 33.5 | 73.2 | 4 | 25.4 | 7/8 | 101.6 | 4 |
| 1-1/4 | 158.8 | 28.4 | 63.5 | 63.5 | 42.2 | 73.2 | 4 | 25.4 | 7/8 | 111.3 | 5 |
| 1-1/2 | 177.8 | 31.8 | 73.2 | 69.9 | 48.3 | 82.6 | 4 | 28.4 | 1 | 124 | 6 |
| 2 | 215.9 | 38.1 | 91.9 | 104.6 | 60.5 | 101.6 | 8 | 25.4 | 7/8 | 165.1 | 11 |
| 2-1/2 | 244.3 | 41.1 | 104.6 | 124 | 73.2 | 104.6 | 8 | 28.4 | 1 | 190.5 | 16 |
| 3 | 266.7 | 47.8 | 127 | 133.4 | 88.9 | 117.3 | 8 | 31.8 | 1-1/8 | 203.2 | 22 |
| 4 | 311.2 | 53.8 | 157.2 | 162.1 | 114.3 | 124 | 8 | 35.1 | 1-1/4 | 241.3 | 33 |
| 5 | 374.7 | 73.2 | 185.7 | 196.9 | 141.2 | 155.4 | 8 | 41.1 | 1-1/2 | 292.1 | 59 |
| 6 | 393.7 | 82.6 | 215.9 | 228.6 | 168.4 | 171.5 | 12 | 38.1 | 1-3/8 | 317.5 | 75 |
| 8 | 482.6 | 91.9 | 269.7 | 292.1 | 219.2 | 212.9 | 12 | 44.5 | 1-5/8 | 393.7 | 125 |
| 10 | 584.2 | 108 | 323.9 | 368.3 | 273.1 | 254 | 12 | 50.8 | 1-7/8 | 482.6 | 206 |
| 12 | 673.1 | 124 | 381 | 450.9 | 323.9 | 282.4 | 16 | 53.8 | 2 | 571.5 | 313 |
| 14 | 749.3 | 133.4 | 412.8 | 495.3 | 355.6 | 298.5 | 16 | 60.5 | 2-1/4 | 635 | 426 |
| 16 | 825.5 | 146.1 | 469.9 | 552.5 | 406.4 | 311.2 | 16 | 66.5 | 2-1/2 | 704.9 | 567 |
| 18 | 914.4 | 162.1 | 533.4 | 569.9 | 457.2 | 327.2 | 16 | 73.2 | 2-3/4 | 774.7 | 737 |
| 20 | 984.3 | 177.8 | 584.2 | 641.4 | 508 | 355.6 | 16 | 79.2 | 3 | 831.9 | 930 |
| 24 | 1168.4 | 203.2 | 692.2 | 762 | 609.6 | 406.4 | 16 | 91.9 | 3-1/2 | 990.6 | 1508 |
| Nominal Pipe Size | Outside Dia of Flange (O) | Thick of Flange (C) | Dia of Raised Face (R) | Dia of Hub at Base (X) | Dia of Hub at End (A) | Length thru Hub (V) | No of Holes | Dia of Holes (H) | Dia of Bolts | Dia of Bolt Circle (B) | Approx weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 133.4 | 30.2 | 35.1 | 42.9 | 21.3 | 73.2 | 4 | 22.4 | 3/4 | 88.9 | 3 |
| 3/4 | 139.7 | 31.8 | 42.9 | 50.8 | 26.7 | 79.2 | 4 | 22.4 | 3/4 | 95.3 | 4 |
| 1 | 158.8 | 35.1 | 50.8 | 57.2 | 33.5 | 88.9 | 4 | 25.4 | 7/8 | 108 | 5 |
| 1-1/4 | 184.2 | 38.1 | 63.5 | 73.2 | 42.2 | 95.3 | 4 | 28.4 | 1 | 130 | 8 |
| 1-1/2 | 203.2 | 44.5 | 73.2 | 79.2 | 48.3 | 111.3 | 4 | 31.8 | 1-1/8 | 146.1 | 11 |
| 2 | 235 | 50.8 | 91.9 | 95.3 | 60.5 | 127 | 8 | 28.4 | 1 | 171.5 | 19 |
| 2-1/2 | 266.7 | 57.2 | 104.6 | 114.3 | 73.2 | 142.7 | 8 | 31.8 | 1-1/8 | 196.9 | 24 |
| 3 | 304.8 | 66.5 | 127 | 133.4 | 88.9 | 168.1 | 8 | 35.1 | 1-1/4 | 228.6 | 43 |
| 4 | 355.6 | 76.2 | 157.2 | 165.1 | 114.3 | 190.5 | 8 | 41.1 | 1-1/2 | 273.1 | 66 |
| 5 | 419.1 | 91.9 | 185.7 | 203.2 | 141.2 | 228.6 | 8 | 47.8 | 1-3/4 | 323.9 | 111 |
| 6 | 482.6 | 108 | 215.9 | 235 | 168.4 | 273.1 | 8 | 53.8 | 2 | 368.3 | 172 |
| 8 | 552.5 | 127 | 269.7 | 304.8 | 219.2 | 317.5 | 12 | 53.8 | 2 | 438.2 | 263 |
| 10 | 673.1 | 165.1 | 323.9 | 374.7 | 273.1 | 419.1 | 12 | 66.5 | 2-1/2 | 539.8 | 488 |
| 12 | 762 | 184.2 | 381 | 441.5 | 323.9 | 463.6 | 12 | 73.2 | 2-3/4 | 619.3 | 692 |
| Physical Properties | Metric | Comments |
|---|---|---|
| Density | 0.190 - 9.01 g/cc | Average value: 7.79 g/cc Grade Count:1432 |
| Porosity | 0.000 - 5.00 % | Average value: 2.97 % Grade Count:15 |
| Particle Size | 0.000 - 300 µm | Average value: 37.9 µm Grade Count:88 |
| Permeability | 0.0150 - 1.00 | Average value: 0.509 Grade Count:4 |
| Thickness | 20.0 - 508 microns | Average value: 86.8 microns Grade Count:14 |
| Mechanical Properties | Metric | Comments |
| Hardness, Brinell | 80.0 - 600 | Average value: 251 Grade Count:564 |
| Hardness, Knoop | 97.0 - 662 | Average value: 301 Grade Count:276 |
| Hardness, Rockwell A | 51.1 - 58.0 | Average value: 54.0 Grade Count:8 |
| Hardness, Rockwell B | 37.0 - 130 | Average value: 86.2 Grade Count:503 |
| Hardness, Rockwell C | 10.0 - 71.0 | Average value: 39.6 Grade Count:447 |
| Hardness, Vickers | 82.0 - 1100 | Average value: 294 Grade Count:339 |
| Tensile Strength, Ultimate | 32.3 - 3100 MPa | Average value: 935 MPa Grade Count:1729 |
| Tensile Strength, Yield | 25.0 - 2500 MPa | Average value: 669 MPa Grade Count:1638 |
| Elongation at Break | 0.000 - 88.0 % | Average value: 26.5 % Grade Count:1583 |
| Elongation at Yield | 0.000 - 62.0 % | Average value: 22.7 % Grade Count:22 |
| Reduction of Area | 0.500 - 88.0 % | Average value: 49.3 % Grade Count:308 |
| Modulus of Elasticity | 2.36 - 310 GPa | Average value: 196 GPa Grade Count:1175 |
| Flexural Yield Strength | 58.0 - 938 MPa | Average value: 479 MPa Grade Count:4 |
| Compressive Yield Strength | 262 - 3000 MPa | Average value: 1080 MPa Grade Count:11 |
| Notched Tensile Strength | 710 - 2230 MPa | Average value: 1740 MPa Grade Count:30 |
| Bulk Modulus | 166 GPa | Average value: 166 GPa Grade Count:14 |
| Poissons Ratio | 0.120 - 0.380 | Average value: 0.282 Grade Count:310 |
| Fatigue Strength | 85.0 - 1070 MPa | Average value: 439 MPa Grade Count:54 |
| Fracture Toughness | 17.6 - 165 MPa-m½ | Average value: 90.9 MPa-m½ Grade Count:9 |
| Machinability | 18.0 - 65.0 % | Average value: 31.7 % Grade Count:126 |
| Shear Modulus | 62.1 - 86.5 GPa | Average value: 77.6 GPa Grade Count:324 |
| Shear Strength | 74.5 - 597 MPa | Average value: 358 MPa Grade Count:5 |
| Izod Impact | 16.3 - 208 J | Average value: 115 J Grade Count:140 |
| Izod Impact Unnotched | 13.6 - 149 J | Average value: 77.8 J Grade Count:13 |
| Charpy Impact | 0.500 - 404 J | Average value: 115 J Grade Count:253 |
| Charpy Impact, Unnotched | 7.46 - 294 J | Average value: 157 J Grade Count:9 |
| Charpy Impact Unnotched | 1.59 - 60.0 J/cm² | Average value: 22.0 J/cm² Grade Count:3 |
| Charpy Impact, Notched | 0.710 - 294 J/cm² | Average value: 137 J/cm² Grade Count:5 |
| Taber Abrasion, mg/1000 Cycles | 3.20 - 30.0 | Average value: 11.3 Grade Count:3 |
| Electrical Properties | Metric | Comments |
| Electrical Resistivity | 0.00000450 - 0.000145 ohm-cm | Average value: 0.0000729 ohm-cm Grade Count:962 |
| Magnetic Permeability | 1.00 - 3000 | Average value: 178 Grade Count:316 |
| Magnetic Coercive Force, Hc | 1.20 - 7.00 Oe | Average value: 2.40 Oe Grade Count:6 |
| Magnetic Saturation Flux Density, Bmax | 11900 - 17000 Gauss | Average value: 15000 Gauss Grade Count:6 |
| Magnetic Remanence, Br | 2500 - 8500 Gauss | Average value: 6000 Gauss Grade Count:6 |
| Curie Temperature | -115 - 732 °C | Average value: 266 °C Grade Count:14 |
| Thermal Properties | Metric | Comments |
| CTE, linear | 7.02 - 21.1 µm/m-°C | Average value: 15.4 µm/m-°C Grade Count:977 |
| Specific Heat Capacity | 0.200 - 0.850 J/g-°C | Average value: 0.478 J/g-°C Grade Count:934 |
| Thermal Conductivity | 10.0 - 34.3 W/m-K | Average value: 16.7 W/m-K Grade Count:567 |
| Melting Point | 1230 - 1530 °C | Average value: 1440 °C Grade Count:580 |
| Solidus | 1230 - 1480 °C | Average value: 1410 °C Grade Count:553 |
| Liquidus | 1360 - 1530 °C | Average value: 1460 °C Grade Count:553 |
| Maximum Service Temperature, Air | 100 - 1400 °C | Average value: 837 °C Grade Count:368 |
| Minimum Service Temperature, Air | -200 - -30.0 °C | Average value: -133 °C Grade Count:26 |
| Optical Properties | Metric | Comments |
| Emissivity (0-1) | 0.7 | Average value: 0.700 Grade Count:4 |
| Processing Properties | Metric | Comments |
| Processing Temperature | 382 - 863 °C | Average value: 767 °C Grade Count:4 |
| Annealing Temperature | 593 - 1200 °C | Average value: 977 °C Grade Count:31 |
| Hot-Working Temperature | 482 - 1290 °C | Average value: 960 °C Grade Count:13 |
Our website provides a complete list of Weld Neck Flanges, as well as information on mechanical specifications, weight, dimensions, sizes, and physical properties. Detailed Chart in PDF Format and tabular format with a user friendly table is provided for the convenience of the engineer, designer, and the manufacturer. Weld Neck Flanges constitute the key element of the piping systems providing leakproof joints and safe flowing of contents. Knowing the mechanical properties, weight restriction, and dimensions are critical for successful use of the materials. Our resource allows users to instantly get all the needed data, and this gives them more grounds to make informed decisions and reduces the time spent on projects. Visit our site to download the complete set of data about Weld Neck Flanges, to ensure your project is precise and dependable.