Long Stub End
Long Stub End
ASME B16.9 | Long Pattern Stub Ends | Butt-Welding Pipe Fittings | NPS 1/2″–36″ | Carbon Steel, Stainless Steel, Duplex, Alloy & Nickel Alloys
Elite Long Stub Ends are butt-welding pipe fittings used with lap joint flanges to provide a detachable flanged connection while the stub end is welded to the pipe. The extended hub provides a longer weld-neck section than a standard short-pattern stub end and can be selected where additional length, welding access or specific piping geometry is required.
Elite supplies Long Stub Ends in seamless, welded and fabricated construction, with carbon steel, stainless steel, duplex, alloy steel, nickel alloy, copper-nickel and other materials according to applicable standards and project requirements.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Elite |
| Product | Long Stub End |
| Primary Standard | ASME B16.9 where applicable |
| Configuration | Long Pattern / Long Hub Stub End |
| Size Range | NPS 1/2"–36" and project specified |
| Construction | Seamless / Welded / Fabricated |
| End Connection | Butt Weld |
| Flange Compatibility | Lap Joint Flange |
| Wall Thickness | SCH 5S, 10S, 20, 40S, STD, 80S, XS, 100, 120, 140, 160, XXS and custom |
| Dimensions | Applicable standard / project drawing |
| End Preparation | ASME B16.25 where applicable |
| Lap / Flange Face | According to mating lap joint flange and project requirements |
| Material Standards | ASTM / ASME applicable specifications |
| 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 |
Product Configurations
| Configuration | Description |
|---|---|
| Long Pattern Stub End | Extended hub configuration |
| Lap Joint Stub End | Used with a loose lap joint flange |
| Seamless Stub End | Seamless construction for applicable sizes/materials |
| Welded Stub End | Welded construction for selected sizes/materials |
| Fabricated Stub End | Custom large-diameter or special construction |
| Custom Stub End | Special dimensions manufactured to approved drawings |
Applicable Standards
ASME B16.9
Applicable to factory-made wrought buttwelding fittings and applicable stub-end configurations.
ASME B16.25
Butt-welding end preparation.
ASME B16.5
Applicable to the mating lap joint flange dimensions and pressure class where applicable.
ASME B16.47
Applicable to associated large-diameter flange arrangements where required.
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.
Note: Stub ends should be specified according to their applicable configuration, material and mating flange arrangement. ASME B16.28 should not be presented as the primary current standard.
Materials
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.
Long Stub End Configurations
Long Pattern Stub End
Extended hub configuration designed to provide additional length compared with standard short-pattern stub ends.
Lap Joint Stub End
Used together with a loose lap joint flange to create a detachable flanged connection.
Seamless Stub End
Seamless construction for applicable sizes, materials and wall thicknesses.
Welded Stub End
Welded construction for selected sizes and materials where permitted by the applicable specification.
Fabricated Stub End
Custom-fabricated construction for large diameters, special wall thicknesses and project-specific requirements.
Design Features
- Extended hub / long-pattern configuration
- Butt-welding connection to the pipe
- Designed for use with lap joint flanges
- Allows flange rotation for easier bolt-hole alignment
- Suitable for systems requiring frequent dismantling
- Available in seamless, welded and fabricated construction
- Controlled wall thickness and dimensional tolerances
- Beveled welding ends according to ASME B16.25 where applicable
- Wide range of material and grade options
- PMI and NDE available for critical services
- Custom hub length and dimensions available
Dimensions & Wall Thickness
Stub End dimensions depend on the stub-end configuration, pipe size, wall thickness, flange arrangement and applicable project requirements.
Available wall thicknesses include:
SCH 5S, 10S, 20, 40S, STD, 80S, XS, 100, 120, 140, 160 and XXS, together with project-specific wall thicknesses.
Key dimensions can include:
- Nominal Pipe Size
- Outside Diameter
- Inside Diameter
- Wall Thickness
- Hub Length
- Overall Length
- Lap / flange engagement dimensions
- Butt-weld end preparation
For non-standard Long Stub Ends, dimensions can be manufactured according to approved engineering drawings.
Manufacturing & Quality
Elite Long Stub Ends are manufactured using suitable forming, machining, welding and fabrication processes according to material, size and project requirements.
Quality control can include:
- Raw material inspection
- Heat number traceability
- Chemical and mechanical verification
- Dimensional inspection
- Visual inspection
- Positive Material Identification (PMI)
- Hardness testing
- Ultrasonic Testing (UT)
- Radiographic Testing (RT)
- Magnetic Particle Testing (MT)
- Liquid Penetrant Testing (PT)
- Heat-treatment verification
- Final marking and identification
- Material Test Certificates
- Inspection and test reports
Custom Engineering
Elite can manufacture Long Stub Ends according to customer drawings, piping isometrics and project specifications, including:
- Large-diameter stub ends
- Extended hub lengths
- Heavy-wall construction
- Special wall thickness
- Custom dimensions
- Special materials and alloys
- High-pressure and high-temperature service
- Sour-service requirements
- Fabricated construction
- Special end preparations
- Special coatings and finishes
- Client-specific inspection requirements
Inspection & Documentation
Depending on project requirements, supply can include:
- Material Test Certificate
- EN 10204 3.1 / 3.2
- Dimensional Inspection Report
- PMI Report
- Heat Treatment Report
- NDE Reports
- Hardness Report
- Hydrostatic Test Report where required
- Certificate of Conformance
- Packing List
- Certificate of Origin
- Third-Party Inspection documentation
Applications
Elite Long Stub Ends are used in:
- Oil & Gas
- Refineries
- Petrochemical Plants
- Chemical Processing
- LNG & Natural Gas
- Power Generation
- Process Piping
- Offshore & Marine
- Water Treatment
- Desalination
- Pulp & Paper
- Pharmaceutical Processing
- Food Processing
- Utility Piping
- Industrial Fabrication
Long Stub Ends are particularly useful in piping systems where detachable flange connections, flange rotation and additional hub length are required.
Ordering Information
When ordering Long Stub Ends, please specify:
| Item | Required Information |
| Product | Long Pattern Stub End |
| Size | NPS |
| Configuration | Long Pattern / Lap Joint Stub End |
| Material & Grade | ASTM / ASME specified grade |
| Wall Thickness | Schedule or actual thickness |
| Construction | Seamless / Welded / Fabricated |
| Applicable Standard | ASME / ASTM / Project Specification |
| Stub End Length | Standard / Project Specified |
| End Preparation | ASME B16.25 or project specified |
| Flange Compatibility | Lap Joint Flange size / class / facing as applicable |
| 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″ Long Pattern Stub End, ASME B16.9, ASTM A403 WP316L, SCH 40S, Seamless, ASME B16.25 Bevel Ends, for 6″ Class 150 Lap Joint Flange, EN 10204 3.1, PMI.
