Stub End
Yunming Metal supplies stainless steel stub ends used with lap joint flanges for easy bolt alignment and disassembly. Available in Type A, B, and C designs, and stainless steel grades 304, 316L, and 2205. Ideal for pipelines requiring frequent maintenance.
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Product Overview
A stub end is a pipe fitting used in conjunction with lap joint flanges. It allows the flange to rotate freely around the pipe, enabling easier bolt alignment and disassembly in high-corrosion or high-cycle applications. Stub ends are widely used where frequent dismantling of pipelines is required, especially in stainless steel and lined piping systems.
Application Areas
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Petrochemical and chemical plants
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Pharmaceutical and hygienic piping
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Desalination and water treatment systems
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Food and beverage processing lines
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Offshore and marine engineering
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Piping systems requiring frequent maintenance
Product Features
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Used with lap joint flanges for easy installation and alignment
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Ideal for non-welded flange movement and pipe disassembly
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Available in long and short pattern (Type A, B, and C)
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High corrosion resistance and mechanical strength
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Manufactured according to ASME B16.9, MSS-SP-43, and DIN standards
Technical Specifications
| Parameter | Specification Range |
|---|---|
| NPS (Nominal Pipe Size) | 1/2″ – 48″ |
| Outer Diameter | 21.3 mm – 1219 mm (approx. ¹³⁄₁₆″ – 48″) |
| Wall Thickness | 2 mm – 20 mm (approx. ¹⁄₁₆″ – ¹³⁄₁₆″) |
| Types | Type A / Type B / Type C |
| Material Grades | 304 / 304L / 316L / 321 / 310S / 2205 / 2507 etc. |
| Surface Finish | Pickling / Sand blasting / Polished |
| Standard Compliance | ASME B16.9, MSS-SP-43, EN, DIN |
| Connection Type | Butt welded |
| Packaging | Woven bags, wooden boxes, or export-standard packaging |
Manufacturing Process
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Stainless steel tube cutting and end forming
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Flange collar forming
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Precision machining (stub + lap)
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Surface treatment (pickling or polishing)
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Dimensional and standard compliance testing
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Marking and packaging
Frequently Asked Questions
Q1: What is the function of a stub end?
A1: It is used with lap joint flanges to allow rotation and ease of disassembly in pipeline systems.
Q2: Do you offer both short and long pattern stub ends?
A2: Yes, we offer Type A (long), Type B, and Type C (short) based on customer requirements.
Q3: What materials are available?
A3: Available in 304, 316L, 321, 310S, 2205, 2507 and other stainless grades.
Q4: What standards do your stub ends meet?
A4: Our products comply with ASME B16.9, MSS-SP-43, EN, and DIN standards.
Q5: Are stub ends suitable for lined or coated piping?
A5: Yes, they are widely used in PTFE-lined or corrosion-resistant pipe systems.
Still Have Questions?
Feel free to contact us for more details or to discuss your custom stub end requirements. Our technical support team is ready to assist with specifications, certifications, and delivery.
