STUB ENDS PRODUCT LISTING FOR MADE-IN-CHINA.COM
Navigation Menu
- Product Overview
- Technical Specifications
- Key Features & Advantages
- Quality & Compliance
- Applications
- Customization Options
- Packaging & Shipping
- Why Partner With Us?
1. Product Overview
Stub Ends (Lap Joint Fittings)
Stub ends are short pipe fittings designed to pair with lap joint flanges, creating a demountable joint in pipeline systems. They feature a raised face (RF) or flat face (FF) sealing surface and a smooth "hub" that accommodates the flange's gasket. Ideal for applications requiring frequent disassembly or alignment adjustments.
2. Technical Specifications
| Parameter |
Details |
| Size Range |
DN15-DN2000 (1/2"-80"), custom sizes available |
| Material Options |
Stainless Steel (304/316L), Carbon Steel (A105), Alloy Steel (A182 F11/F22) |
| Pressure Rating |
PN10-PN40 (Class 150-300) |
| Temperature Range |
-29°C to 425°C (carbon steel), -196°C to 600°C (stainless steel) |
| Standards Compliance |
GB/T12459, ASME B16.9, MSS SP-43, DIN 2642 |
| Surface Finish |
Anti-rust Oil, Black Paint, Galvanized, Epoxy Coating |
| Tolerance |
±0.5mm (OD/ID), ±1° (bevel angle) |
3. Key Features & Advantages
- Cost-Effective Solution:
- Reusable lap joint flanges reduce material costs vs. weld-neck flanges.
- Stub ends can be replaced without re-welding the pipeline.
- Alignment Flexibility:
- Flange rotates freely on the stub end hub, simplifying bolt hole alignment.
- Ideal for pipelines with thermal expansion/contraction.
- Material Versatility:
- Carbon Steel (A105): General-purpose, cost-effective.
- Stainless Steel (316L): Corrosion-resistant for marine/chemical use.
- Precision Engineering:
- Cold-formed or hot-pressed for uniform wall thickness.
- Beveled ends (37.5°) for full-penetration welding.
4. Quality & Compliance
- Certifications:
- ISO 9001:2015 Quality Management System.
- PED 2014/68/EU (EU Pressure Equipment Directive).
- ABS, DNV, and Lloyd's Register approvals for marine use.
- Testing:
- 100% dimensional inspection (calibrated gauges).
- Hydrostatic testing (1.5× working pressure, 30-min hold).
- PMI (Positive Material Identification) for alloy verification.
- Traceability:
- Laser-etched heat number and batch code on each stub end.
5. Applications
- Oil & Gas:
- Pipeline pig launchers/receivers, offshore platforms.
- Chemical Processing:
- Reactor feed lines, distillation columns.
- Power Generation:
- Boiler feedwater systems, steam condensate lines.
- Water Treatment:
- Pump stations, filtration units.
- Marine:
- Ballast systems, fire suppression lines.
6. Customization Options
| Option |
Details |
| Material |
Duplex 2205, Hastelloy C-276, Titanium for extreme corrosion resistance |
| End Preparation |
Beveled, plain end, or threaded (NPT/BSP) |
| Surface Treatment |
Electropolished (Ra≤0.4μm), rubber-lined, PTFE-coated |
| Marking |
Custom laser etching (logo, part number, heat code) |
7. Packaging & Shipping
- Packaging:
- Standard: Wooden crates with anti-rust paper.
- Premium: Vacuum-sealed PE film + export plywood cases.
- Lead Time:
- Stock items: 5-7 days.
- Custom orders: 20-30 days.
- Shipping:
- FOB/CIF/DDP terms, door-to-door logistics support.
8. Why Partner With Us?
- 20+ Years of Expertise: Specializing in stub ends and lap joint fittings.
- Factory-Direct Pricing: Save 30-50% vs. European/US suppliers.
- Engineering Support: Free FEA (Finite Element Analysis) for critical applications.
- MOQ Flexibility: Accept small batches for trial orders.
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