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Butt weld cap is usually welded to the pipe end to cover the pipe fittings. The convex cap have several shapes: a hemispherical cap, an elliptical cap, a dish cap, and a spherical cap. From the point of view of force, the hemispherical cap is gradually not good to manufacture, but it is gradually manufactured from the viewpoint of manufacturing difficulty.
There are various production standards for butt weld cap internationally. ASME B16.9 is a standard developed by the American Society of Mechanical Engineers (ASME) . It specifies requirements for the size, material, pressure rating, marking, and inspection of welded pipe components.
Material of Butt Weld cap
Carbon Steel
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Cr | Mo | Ni | Cu | V |
| ASTM A234 WPB | MIN | 0.29 | 0.10 | ||||||||
| MAX | 0.30 | 1.06 | 0.050 | 0.058 | 0.40 | 0.15 | 0.40 | 0.40 | 0.08 |
Stainless Stee
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Ni | Cr | Mo |
| ASTM A403 WP304 | MIN | 8.0 | 18.0 | ||||||
| MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 11.0 | 20.0 | ||
| ASTM A403 WP316 | MIN | 10.0 | 16.0 | 2.00 | |||||
| MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 14.0 | 18.0 | 3.00 |
Dimension of ASME B16.9 Butt Weld Cap
| DN | NPS | OD | E | E1 |
| 15 | 1/2 | 21.3 | 25 | 25 |
| 20 | 3/4 | 26.7 | 25 | 25 |
| 25 | 1 | 33.4 | 38 | 38 |
| 32 | 11/4 | 42.2 | 38 | 38 |
| 40 | 11/2 | 48.3 | 38 | 38 |
| 50 | 2 | 60.3 | 38 | 44 |
| 65 | 21/2 | 73.0 | 38 | 51 |
| 80 | 3 | 88.9 | 51 | 64 |
| 90 | 31/2 | 101.6 | 64 | 76 |
| 100 | 4 | 114.3 | 64 | 76 |
| 125 | 5 | 141.3 | 76 | 89 |
| 150 | 6 | 168.3 | 89 | 102 |
| 200 | 8 | 219.1 | 102 | 127 |
| 250 | 10 | 273.0 | 127 | 152 |
| 300 | 12 | 323.8 | 152 | 178 |
| 350 | 14 | 355.6 | 165 | 191 |
| 400 | 16 | 406.4 | 178 | 203 |
| 450 | 18 | 457.0 | 203 | 229 |
| 500 | 20 | 508.0 | 229 | 254 |
| 550 | 22 | 559.0 | 254 | 254 |
| 600 | 24 | 610.0 | 267 | 305 |
| 650 | 26 | 660.0 | 267 | — |
| 700 | 28 | 711.0 | 267 | — |
| 750 | 30 | 762.0 | 267 | — |
| 800 | 32 | 813.0 | 267 | — |
| 850 | 34 | 864.0 | 267 | — |
| 900 | 36 | 914.0 | 267 | — |
| 950 | 38 | 965.0 | 305 | — |
| 1000 | 40 | 1016.0 | 305 | — |
| 1050 | 42 | 1067.0 | 305 | — |
| 1100 | 44 | 1118.0 | 343 | — |
| 1150 | 46 | 1168.0 | 343 | — |
| 1200 | 48 | 1219.0 | 343 | — |
The size range of butt weld cap is wide, suitable for various pipeline system requirements. Therefore widely used in industries such as petroleum, chemical, natural gas, and construction.
Our Supply Range for Butt Weld cap
Standard: ASTM A234, MSS SP-75, ASTM A403
Manufacturing Standard: ASME B16.9, DIN2615, JIS B2312
Size Range: 1/2”, 1”, 2”, 3”, 4”, 6”, 8”, 10”, 12”, 16”, 20” to 48”. (DN15-DN1200)
Thickness: SCH 10,SCH 40,SCH80,SCH160,SCH XXS
Surface Coatings: Black Painted, Varnished, Epoxy Coated, Galvanized
Butt weld cap is usually welded to the pipe end to cover the pipe fittings. The convex cap have several shapes: a hemispherical cap, an elliptical cap, a dish cap, and a spherical cap. From the point of view of force, the hemispherical cap is gradually not good to manufacture, but it is gradually manufactured from the viewpoint of manufacturing difficulty.
There are various production standards for butt weld cap internationally. ASME B16.9 is a standard developed by the American Society of Mechanical Engineers (ASME) . It specifies requirements for the size, material, pressure rating, marking, and inspection of welded pipe components.
Material of Butt Weld cap
Carbon Steel
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Cr | Mo | Ni | Cu | V |
| ASTM A234 WPB | MIN | 0.29 | 0.10 | ||||||||
| MAX | 0.30 | 1.06 | 0.050 | 0.058 | 0.40 | 0.15 | 0.40 | 0.40 | 0.08 |
Stainless Stee
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Ni | Cr | Mo |
| ASTM A403 WP304 | MIN | 8.0 | 18.0 | ||||||
| MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 11.0 | 20.0 | ||
| ASTM A403 WP316 | MIN | 10.0 | 16.0 | 2.00 | |||||
| MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 14.0 | 18.0 | 3.00 |
Dimension of ASME B16.9 Butt Weld Cap
| DN | NPS | OD | E | E1 |
| 15 | 1/2 | 21.3 | 25 | 25 |
| 20 | 3/4 | 26.7 | 25 | 25 |
| 25 | 1 | 33.4 | 38 | 38 |
| 32 | 11/4 | 42.2 | 38 | 38 |
| 40 | 11/2 | 48.3 | 38 | 38 |
| 50 | 2 | 60.3 | 38 | 44 |
| 65 | 21/2 | 73.0 | 38 | 51 |
| 80 | 3 | 88.9 | 51 | 64 |
| 90 | 31/2 | 101.6 | 64 | 76 |
| 100 | 4 | 114.3 | 64 | 76 |
| 125 | 5 | 141.3 | 76 | 89 |
| 150 | 6 | 168.3 | 89 | 102 |
| 200 | 8 | 219.1 | 102 | 127 |
| 250 | 10 | 273.0 | 127 | 152 |
| 300 | 12 | 323.8 | 152 | 178 |
| 350 | 14 | 355.6 | 165 | 191 |
| 400 | 16 | 406.4 | 178 | 203 |
| 450 | 18 | 457.0 | 203 | 229 |
| 500 | 20 | 508.0 | 229 | 254 |
| 550 | 22 | 559.0 | 254 | 254 |
| 600 | 24 | 610.0 | 267 | 305 |
| 650 | 26 | 660.0 | 267 | — |
| 700 | 28 | 711.0 | 267 | — |
| 750 | 30 | 762.0 | 267 | — |
| 800 | 32 | 813.0 | 267 | — |
| 850 | 34 | 864.0 | 267 | — |
| 900 | 36 | 914.0 | 267 | — |
| 950 | 38 | 965.0 | 305 | — |
| 1000 | 40 | 1016.0 | 305 | — |
| 1050 | 42 | 1067.0 | 305 | — |
| 1100 | 44 | 1118.0 | 343 | — |
| 1150 | 46 | 1168.0 | 343 | — |
| 1200 | 48 | 1219.0 | 343 | — |
The size range of butt weld cap is wide, suitable for various pipeline system requirements. Therefore widely used in industries such as petroleum, chemical, natural gas, and construction.
Our Supply Range for Butt Weld cap
Standard: ASTM A234, MSS SP-75, ASTM A403
Manufacturing Standard: ASME B16.9, DIN2615, JIS B2312
Size Range: 1/2”, 1”, 2”, 3”, 4”, 6”, 8”, 10”, 12”, 16”, 20” to 48”. (DN15-DN1200)
Thickness: SCH 10,SCH 40,SCH80,SCH160,SCH XXS
Surface Coatings: Black Painted, Varnished, Epoxy Coated, Galvanized
