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Size Range: 1/2" - 48" / DN15 - 1200
Thickness Schedule: SCH 10 - SCH 160, XXS
Standard: ANSI / ASME B16.9
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ASME 16.9 Steel pipe caps are usually welded onto end of pipe that blcok off the piping line system, it has same funtion with plugs and blind flanges. It is available in material of carbon steel, stainless steel and alloy steel.
Butt weld cap dimensions is from 1/2" to 48" and thickness covers Sch 10S, Sch 40, Sch 80, Sch 160, STD, XS, XXS. We can manufacture BW CAP in stanadrd of ASME B16.9, MSS SP 43, DIN, JIS and EN.
Difference between Steel Pipe Caps and Plugs
Connection
Steel pipe caps are used to connect with pipeline by welding and screwing. There is one way for plugs that screw on the ends of pipe.
Shape
There are three shapes of steel pipe cap that butt weld cap, socket weld cap and threaded cap. While threaded plug have hex head, round head and square head.
Standard
Manufacturing standard of pipe cap is ASME B16.9 & ASME B16.11 and plug is ASME B16.11
Process
The manufacturing process for threaded plug is forging and casting. While for caps, it is hot press or cold press and forging.
Thread
Threaded cap have female thread while plug is male thread.
Steel Pipe Cap Material Grade
Carbon Steel Cap
ASTM A234 WPB/WPC, ASTM A420 WPL6, ASTM A860 WPHY 42 / 46 / 56 / 60 / 65
Alloy Steel Cap
ASTM A234 WP11 / WP12 / WP5 / WP9 / WP22 / WP91 / WP92, 15CrMoG,12Cr1MoVG, 12Cr5Mo, 1Cr5Mo, Cr9Mo, 10CrMo910, 12CrMo4-5
Stainless Steel Cap
ASTM A403 WP304/304L/304H, 316/316L, 310S, 317, 347, 904L, A815 S32205, S31803, 32750, 32760
Inspection and Package of Butt Weld Cap
CAP BW SEAMLESS 36 INCH SCH 40 ASTM A234 WPB ASME B16.9
ASME B16.9 Steel Pipe Cap Dimensions
| 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 | --- |
Notes:
1) The configuration of the cap is normal ellipse.
2) Length E applies for the thickness not exceeding the Limitting Wall Thickness.For the caps with DN≥650(NPS26), they will be made subject to the sizes agreed between purchaser and manufacturer or be supplied according to manufacturer's size.
Stainelss Steel Pipe Cap Weight
| DN | NPS | SCH20 | SCH30 | STD | SCH40S | XS | SCH80S | SCH160 | XXS |
| 15 | 1/2 | 0.04 | 0.04 | 0.04 | 0.06 | 0.06 | 0.08 | 0.11 | |
| 20 | 3/4 | 0.05 | 0.05 | 0.05 | 0.07 | 0.07 | 0.11 | 0.15 | |
| 25 | 1 | 0.10 | 0.12 | 0.12 | 0.16 | 0.16 | 0.22 | 0.32 | |
| 32 | 1¼ | 0.13 | 0.16 | 0.16 | 0.22 | 0.22 | 0.28 | 0.43 | |
| 40 | 1½ | 0.16 | 0.19 | 0.19 | 0.26 | 0.26 | 0.36 | 0.52 | |
| 50 | 2 | 0.21 | 0.26 | 0.26 | 0.36 | 0.36 | 0.57 | 0.73 | |
| 65 | 2½ | 0.40 | 0.44 | 0.44 | 0.59 | 0.59 | 0.80 | 1.18 | |
| 80 | 3 | 0.65 | 0.73 | 0.73 | 1.08 | 1.08 | 1.48 | 2.02 | |
| 90 | 3½ | 0.90 | 1.07 | 1.07 | 1.51 | 1.51 | |||
| 100 | 4 | 1.04 | 1.30 | 1.30 | 1.85 | 1.85 | 2.91 | 3.69 | |
| 125 | 5 | 2.10 | 2.10 | 3.06 | 3.06 | 5.09 | 6.10 | ||
| 150 | 6 | 3.19 | 3.19 | 4.93 | 4.93 | 8.20 | 9.86 | ||
| 200 | 8 | 4.45 | 4.92 | 5.72 | 5.72 | 8.88 | 8.88 | 16.1 | 15.6 |
| 250 | 10 | 6.89 | 8.46 | 10.1 | 10.1 | 13.8 | 16.4 | 31.0 | 27.6 |
| 300 | 12 | 9.75 | 12.9 | 14.6 | 15.9 | 19.5 | 26.9 | 51.2 | 39.0 |
| 350 | 14 | 14.6 | 17.6 | 17.5 | 20.5 | 23.3 | 35.0 | 65.7 | |
| 400 | 16 | 18.3 | 22.1 | 22.1 | 29.4 | 29.4 | 49.7 | 93.8 | |
| 450 | 18 | 23.4 | 32.9 | 28.2 | 42.2 | 37.5 | 70.4 | 134 | |
| 500 | 20 | 35.1 | 46.8 | 35.1 | 55.6 | 46.8 | 96.5 | 184 | |
| 550 | 22 | 42.7 | 56.9 | 42.7 | 57.0 | 128 | 242 | ||
| 600 | 24 | 49.7 | 74.5 | 49.7 | 91.2 | 66.3 | 162 | 311 | |
| 650 | 26 | 74.0 | 55.6 | 74.1 | |||||
| 700 | 28 | 82.4 | 103 | 61.8 | 82.4 | ||||
| 750 | 30 | 91.2 | 114 | 68.5 | 91.2 | ||||
| 800 | 32 | 101 | 126 | 75.4 | 138 | 101 | |||
| 850 | 34 | 110 | 138 | 82.7 | 152 | 110 | |||
| 900 | 36 | 120 | 150 | 90.2 | 180 | 120 | |||
| 950 | 38 | 104 | 139 | ||||||
| 1000 | 40 | 113 | 150 | ||||||
| 1050 | 42 | 122 | 162 | ||||||
| 1100 | 44 | 138 | 184 | ||||||
| 1150 | 46 | 148 | 197 | ||||||
| 1200 | 48 | 158 | 210 |
ASME 16.9 Steel pipe caps are usually welded onto end of pipe that blcok off the piping line system, it has same funtion with plugs and blind flanges. It is available in material of carbon steel, stainless steel and alloy steel.
Butt weld cap dimensions is from 1/2" to 48" and thickness covers Sch 10S, Sch 40, Sch 80, Sch 160, STD, XS, XXS. We can manufacture BW CAP in stanadrd of ASME B16.9, MSS SP 43, DIN, JIS and EN.
Difference between Steel Pipe Caps and Plugs
Connection
Steel pipe caps are used to connect with pipeline by welding and screwing. There is one way for plugs that screw on the ends of pipe.
Shape
There are three shapes of steel pipe cap that butt weld cap, socket weld cap and threaded cap. While threaded plug have hex head, round head and square head.
Standard
Manufacturing standard of pipe cap is ASME B16.9 & ASME B16.11 and plug is ASME B16.11
Process
The manufacturing process for threaded plug is forging and casting. While for caps, it is hot press or cold press and forging.
Thread
Threaded cap have female thread while plug is male thread.
Steel Pipe Cap Material Grade
Carbon Steel Cap
ASTM A234 WPB/WPC, ASTM A420 WPL6, ASTM A860 WPHY 42 / 46 / 56 / 60 / 65
Alloy Steel Cap
ASTM A234 WP11 / WP12 / WP5 / WP9 / WP22 / WP91 / WP92, 15CrMoG,12Cr1MoVG, 12Cr5Mo, 1Cr5Mo, Cr9Mo, 10CrMo910, 12CrMo4-5
Stainless Steel Cap
ASTM A403 WP304/304L/304H, 316/316L, 310S, 317, 347, 904L, A815 S32205, S31803, 32750, 32760
Inspection and Package of Butt Weld Cap
CAP BW SEAMLESS 36 INCH SCH 40 ASTM A234 WPB ASME B16.9
ASME B16.9 Steel Pipe Cap Dimensions
| 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 | --- |
Notes:
1) The configuration of the cap is normal ellipse.
2) Length E applies for the thickness not exceeding the Limitting Wall Thickness.For the caps with DN≥650(NPS26), they will be made subject to the sizes agreed between purchaser and manufacturer or be supplied according to manufacturer's size.
Stainelss Steel Pipe Cap Weight
| DN | NPS | SCH20 | SCH30 | STD | SCH40S | XS | SCH80S | SCH160 | XXS |
| 15 | 1/2 | 0.04 | 0.04 | 0.04 | 0.06 | 0.06 | 0.08 | 0.11 | |
| 20 | 3/4 | 0.05 | 0.05 | 0.05 | 0.07 | 0.07 | 0.11 | 0.15 | |
| 25 | 1 | 0.10 | 0.12 | 0.12 | 0.16 | 0.16 | 0.22 | 0.32 | |
| 32 | 1¼ | 0.13 | 0.16 | 0.16 | 0.22 | 0.22 | 0.28 | 0.43 | |
| 40 | 1½ | 0.16 | 0.19 | 0.19 | 0.26 | 0.26 | 0.36 | 0.52 | |
| 50 | 2 | 0.21 | 0.26 | 0.26 | 0.36 | 0.36 | 0.57 | 0.73 | |
| 65 | 2½ | 0.40 | 0.44 | 0.44 | 0.59 | 0.59 | 0.80 | 1.18 | |
| 80 | 3 | 0.65 | 0.73 | 0.73 | 1.08 | 1.08 | 1.48 | 2.02 | |
| 90 | 3½ | 0.90 | 1.07 | 1.07 | 1.51 | 1.51 | |||
| 100 | 4 | 1.04 | 1.30 | 1.30 | 1.85 | 1.85 | 2.91 | 3.69 | |
| 125 | 5 | 2.10 | 2.10 | 3.06 | 3.06 | 5.09 | 6.10 | ||
| 150 | 6 | 3.19 | 3.19 | 4.93 | 4.93 | 8.20 | 9.86 | ||
| 200 | 8 | 4.45 | 4.92 | 5.72 | 5.72 | 8.88 | 8.88 | 16.1 | 15.6 |
| 250 | 10 | 6.89 | 8.46 | 10.1 | 10.1 | 13.8 | 16.4 | 31.0 | 27.6 |
| 300 | 12 | 9.75 | 12.9 | 14.6 | 15.9 | 19.5 | 26.9 | 51.2 | 39.0 |
| 350 | 14 | 14.6 | 17.6 | 17.5 | 20.5 | 23.3 | 35.0 | 65.7 | |
| 400 | 16 | 18.3 | 22.1 | 22.1 | 29.4 | 29.4 | 49.7 | 93.8 | |
| 450 | 18 | 23.4 | 32.9 | 28.2 | 42.2 | 37.5 | 70.4 | 134 | |
| 500 | 20 | 35.1 | 46.8 | 35.1 | 55.6 | 46.8 | 96.5 | 184 | |
| 550 | 22 | 42.7 | 56.9 | 42.7 | 57.0 | 128 | 242 | ||
| 600 | 24 | 49.7 | 74.5 | 49.7 | 91.2 | 66.3 | 162 | 311 | |
| 650 | 26 | 74.0 | 55.6 | 74.1 | |||||
| 700 | 28 | 82.4 | 103 | 61.8 | 82.4 | ||||
| 750 | 30 | 91.2 | 114 | 68.5 | 91.2 | ||||
| 800 | 32 | 101 | 126 | 75.4 | 138 | 101 | |||
| 850 | 34 | 110 | 138 | 82.7 | 152 | 110 | |||
| 900 | 36 | 120 | 150 | 90.2 | 180 | 120 | |||
| 950 | 38 | 104 | 139 | ||||||
| 1000 | 40 | 113 | 150 | ||||||
| 1050 | 42 | 122 | 162 | ||||||
| 1100 | 44 | 138 | 184 | ||||||
| 1150 | 46 | 148 | 197 | ||||||
| 1200 | 48 | 158 | 210 |