ASTM A234 WPB End Cap Carbon Steel Buttweld Pipe Fitting
Overview:
The WPB End Cap is a critical component in various piping and tubing systems, designed to seal the ends or terminations of a pipe or tube. Typically made from materials like plastic, metal, or composite, its primary function is to prevent the ingress of contaminants, fluids, or gases, ensuring the integrity of the system.
In terms of design, it features a snug fit, allowing for seamless installation. Some end caps have additional features like grooves or threading for enhanced security and stability. The choice of material often depends on the application environment—whether it involves high pressure, corrosive substances, or extreme temperatures.
Applications of WPB End Caps are widespread, ranging from plumbing and HVAC systems to industrial machinery and automotive components. These end caps help maintain system efficiency and safety by minimizing leakages and protecting internal components from external elements.
Moreover, they are available in different sizes and shapes to accommodate various pipe diameters and specifications, making them versatile for many installations. When it comes to maintenance, these end caps can usually be removed and replaced easily, facilitating repairs or modifications to the system without significant downtime.
Specification:
| Standard | ASTM A234/ASME SA234 |
| Material | WPB |
| Type | Buttweld Cap |
| Connection | Welding |
| Size | 1/2"-48"(DN15-DN1200) or custom size |
| Thickness | SCH10S-XXS(2-60mm) |
| Surface | Black Painting |
| Packing | Plywood case/Pallet |
Chemical Composition:
| Grade | C | Mn | P | S | Si | Cr | Mo | Ni | Cu | Others |
| WPB | 0.03 max | 0.29-1.06 | 0.05 max | 0.058 max | 0.10 min | 0.40 max | 0.15 max | 0.40 max | 0.40 max | Vanadium 0.08 |
Mechanical Properties:
| Grade | Yield Strength, min,
ksi [MPa] | Tensile Strength, min,
ksi [MPa] | Elongation % |
| WPB | 35(240) | 60(415) | 22 |
Dimension for BW Cap:
 |
| Nominal Size | Out Diameter at Bevel (mm) | Length (mm) | Limiting Wall Thickness for Length E (mm) |
| DN | NPS | O.D. | E | E1 |
| 15 | 1/2 | 21.3 | 25 | 25 | 4.57 |
| 20 | 3/4 | 26.7 | 25 | 25 | 3.81 |
| 25 | 1 | 33.4 | 38 | 38 | 4.57 |
| 32 | 1 1/4 | 42.2 | 38 | 38 | 4.83 |
| 40 | 1 1/2 | 48.3 | 38 | 38 | 5.08 |
| 50 | 2 | 60.3 | 38 | 44 | 5.59 |
| 65 | 2 1/2 | 73.0 | 38 | 51 | 7.11 |
| 80 | 3 | 88.9 | 51 | 64 | 7.62 |
| 90 | 3 1/2 | 101.6 | 64 | 76 | 8.13 |
| 100 | 4 | 114.3 | 64 | 76 | 8.64 |
| 125 | 5 | 141.3 | 76 | 89 | 9.65 |
| 150 | 6 | 168.3 | 89 | 102 | 10.92 |
| 200 | 8 | 219.1 | 102 | 127 | 12.7 |
| 250 | 10 | 273.0 | 127 | 152 | 12.7 |
| 300 | 12 | 323.8 | 152 | 178 | 12.7 |
| 350 | 14 | 355.6 | 165 | 191 | 12.7 |
| 400 | 16 | 406.4 | 178 | 203 | 12.7 |
| 450 | 18 | 457.0 | 203 | 229 | 12.7 |
| 500 | 20 | 508.0 | 229 | 254 | 12.7 |
| 550 | 22 | 559.0 | 254 | 254 | 12.7 |
| 600 | 24 | 610.0 | 267 | 305 | 12.7 |
| 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 | ... | ... |
GENERAL NOTE: The shape of these caps shall be ellipsoidal and shall conform to the requirements given in the ASME Boiler and Pressure Vessel Code.
NOTES:
(1) Length E applies for thickness not exceeding that given in column “Limiting Wall Thickness for Length, E.”
(2) Length E1 applies for thickness greater than that given in column “Limiting Wall Thickness for Length, E” for NPS 24 and smaller. For NPS 26 and larger, length E1 shall be by agreement between the manufacturer and purchaser. |
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ASTM A234 WPB End Cap Carbon Steel Buttweld Pipe Fitting Images
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