ASME B16.9 | Pipe End Caps | Butt-Welding Pipe Fittings | NPS 1/2″–48″ | Carbon Steel, Stainless Steel, Duplex, Alloy & Nickel Alloys
Elite Buttweld End Caps, also known as Pipe Caps, are factory-made fittings used to close the end of a pipe, pipeline or piping component. They provide a permanent butt-welded closure and are available in a range of materials, wall thicknesses and sizes for process, utility and industrial piping systems.
Elite supplies End Caps in seamless, welded and fabricated construction, including carbon steel, stainless steel, duplex, alloy steel, nickel alloy, copper-nickel and other materials according to applicable standards and project requirements.
| Parameter | Specification |
|---|---|
| Manufacturer | Elite |
| Product | Buttweld End Cap / Pipe Cap |
| Primary Standard | ASME B16.9 |
| Configuration | Butt-Weld End Cap |
| Size Range | NPS 1/2"–48" |
| Construction | Seamless / Welded / Fabricated |
| End Connection | Butt Weld |
| Wall Thickness | SCH 5S, 10S, 20, 40S, STD, 80S, XS, 100, 120, 140, 160, XXS and custom |
| Dimensions | ASME B16.9 where applicable |
| End Preparation | ASME B16.25 where applicable |
| Material Standards | ASTM / ASME applicable specifications |
| Cap Profile | Standard / Ellipsoidal / Hemispherical or project specified |
| Heat Treatment | According to material and applicable specification |
| Surface Finish | Pickled / Blasted / Polished / Coated / Project Specified |
| Inspection | Visual, dimensional, PMI, UT, RT, MT, PT, hardness and other NDE as specified |
| Documentation | MTC, EN 10204 3.1/3.2, inspection reports and project documentation |
| Configuration | Description |
|---|---|
| Buttweld End Cap | Permanent welded pipe-end closure |
| Seamless End Cap | Seamless construction for applicable sizes/materials |
| Welded End Cap | Welded construction for selected sizes/materials |
| Fabricated End Cap | Custom large-diameter or special construction |
| Special Profile Cap | Custom geometry manufactured to approved drawings |
ASME B16.9
Primary dimensional standard for factory-made wrought buttwelding fittings, including pipe caps.
ASME B16.25
Butt-welding end preparation.
ASTM / ASME Material Specifications
Applicable material standards according to the selected material and grade.
ASME B31.3 / B31.1
Process and power piping requirements, where applicable.
NACE MR0175 / ISO 15156
For sour-service applications when specifically required by the project.
ASME Section II
Material requirements where applicable to pressure equipment and project specifications.
Note: ASME B16.28 should not be listed as the primary current standard for End Caps. Applicable wrought buttwelding fitting dimensions are covered by ASME B16.9.
Carbon Steel
ASTM A234 WPB, WPC and applicable WPHY grades including WPHY 42, WPHY 46, WPHY 52, WPHY 60, WPHY 65 and WPHY 70.
Low Temperature Carbon Steel
ASTM A420 WPL3, WPL6 and other applicable grades.
Stainless Steel
ASTM A403 WP304/304L, WP316/316L, WP321/321H, WP347/347H and other applicable grades.
Duplex & Super Duplex
ASTM A815 grades including UNS S31803, S32205, S32750 and S32760.
Alloy Steel
ASTM A234 WP1, WP5, WP9, WP11, WP12, WP22 and WP91.
Nickel Alloys
ASTM B366 and applicable specifications for Nickel 200/201, Monel 400/K500, Inconel 600/601/625/800/825, Hastelloy C276 and Alloy 20.
Copper-Nickel Alloys
Applicable Cu-Ni grades including UNS C70600 and C71500.
Titanium
Applicable titanium grades manufactured to the relevant ASTM specification, including ASTM B363 where applicable.
Material selection is based on operating pressure, temperature, process fluid, corrosion conditions, mechanical requirements and applicable project specifications.
Standard Buttweld End Cap
Standard pipe closure designed for permanent butt-welded installation.
Seamless End Cap
Seamless construction for applicable sizes, materials and wall thicknesses.
Welded End Cap
Welded construction for selected sizes and materials where permitted by the applicable specification.
Fabricated End Cap
Custom-fabricated caps for large diameters, heavy wall thicknesses or special configurations.
Special Profile End Caps
Custom geometries and dimensions manufactured according to approved drawings and project requirements.
Important: A buttweld pipe cap is a permanent welded piping closure. It should not be confused with a threaded cap, socket-weld cap or pressure-vessel head.
Standard End Cap dimensions are manufactured in accordance with ASME B16.9, where applicable.
Available wall thicknesses include:
SCH 5S, 10S, 20, 40S, STD, 80S, XS, 100, 120, 140, 160 and XXS, together with project-specific wall thicknesses.
Ordering should identify:
For large-diameter, heavy-wall or fabricated End Caps, dimensions can be manufactured according to approved engineering drawings.
Elite End Caps are manufactured using suitable forming, welding and fabrication processes according to material, size and project requirements.
Quality control can include:
Elite can manufacture End Caps according to customer drawings, piping isometrics and project specifications, including:
Depending on project requirements, supply can include:
Elite Buttweld End Caps are used in:
End Caps are commonly used for permanent closure of pipe ends, branch connections, piping sections and fabricated piping assemblies.
When ordering Buttweld End Caps, please specify:
| Item | Required Information |
| Product | Buttweld End Cap / Pipe Cap |
| Size | NPS |
| Material & Grade | ASTM / ASME specified grade |
| Wall Thickness | Schedule or actual thickness |
| Construction | Seamless / Welded / Fabricated |
| Standard | ASME B16.9 or project specified |
| End Preparation | ASME B16.25 or project specified |
| Profile / Dimensions | Standard / Project Specified |
| Surface Finish | Standard / Pickled / Blasted / Polished / Coated |
| Inspection | PMI / UT / RT / MT / PT / Hardness etc. |
| Documentation | EN 10204 3.1 / 3.2 and project documents |
| Quantity | Required quantity |
| Special Requirements | Drawing, coating, NACE, testing or other project requirements |
Typical Order Example:
6″ Buttweld End Cap, ASME B16.9, ASTM A234 WPB, SCH 40, Seamless, ASME B16.25 Bevel Ends, EN 10204 3.1, PMI.
