Long Pipe Nipple
Product Details
Zhejiang Leadtek Fluid Technology Co., Ltd. is one of the most experienced manufacturers and suppliers of long pipe nipple in China. Please feel free to buy customized long pipe nipple at competitive price from our factory. Also, free sample is available.
Product Overview
Long Pipe Nipple is a male-threaded pipe extension connector machined from stainless steel 304 or 316 bar stock, designed to bridge gaps between valves, instruments, and fittings where a close or short nipple cannot reach. The threaded section is concentrated at one end, leaving a smooth unthreaded barrel along the body - this keeps wrench clearance intact and accommodates insulation without compressing thread profiles.
Available in DN6 (1/8") through DN100 (4") and five standard lengths from 50 mm to 200 mm, the fitting suits high-rotation project BOM requirements where a single range needs to cover multiple pipe schedules.
Specifications
| Size T1 | DN | L (mm) | ØD (mm) | Wall (t) |
|---|---|---|---|---|
| 1/8" | 6 | 50/75/100/150/200 | 10 | 2 |
| 1/4" | 8 | 50/75/100/150/200 | 14 | 2.5 |
| 3/8" | 10 | 50/75/100/150/200 | 17 | 2.5 |
| 1/2" | 15 | 50/75/100/150/200 | 21.3 | 2.5 |
| 3/4" | 20 | 50/75/100/150/200 | 26.7 | 2.5 |
| 1" | 25 | 50/75/100/150/200 | 33.4 | 3 |
| 1¼" | 32 | 50/75/100/150/200 | 42 | 3 |
| 1½" | 40 | 50/75/100/150/200 | 48 | 3 |
| 2" | 50 | 50/75/100/150/200 | 60 | 3.5 |
| 2½" | 65 | 75/100/150/200 | 76 | 4 |
| 3" | 80 | 75/100/150/200 | 89 | 4.5 |
| 4" | 100 | 75/100/150/200 | 114 | 5 |
Tolerance: 1/8"–2" ±1mm | 2½"–4" ±1.5mm
Key Features
Single-end thread, clean barrel body
Thread engagement is limited to one end, keeping the unthreaded section free for clamps, insulation, or close-proximity fittings without thread damage risk.
Scaled wall thickness
Wall steps from 2 mm at DN6 to 5 mm at DN100, maintaining consistent pressure ratings across the size range rather than applying a uniform wall to every diameter.
Dual-grade availability
Both SS304 and SS316 are stocked. Grade selection depends on the media and environment; for buyers comparing the two, our article SS304 vs SS316 For Liquid Cooling Systems: Which Grade Should You Specify? covers the practical trade-offs.
Full size coverage in one supplier
1/8" to 4" from a single source reduces split-sourcing risk and simplifies import documentation.
Typical Applications
The Long Threaded Nipple is typically specified wherever extension reach is needed in process and utility piping:
- Chemical and petrochemical lines requiring corrosion-resistant connections in aggressive media
- Food, beverage, and pharmaceutical piping governed by hygienic material standards
- Fire protection and HVAC branch connections needing a defined setback from structural elements
- Semiconductor and new energy facility utility lines where contamination control requires smooth-bore stainless
- General industrial installations with insulated pipework that cannot accommodate short fittings
How to Order & Custom Options
Standard sizes ship from stock. For project-specific requirements, LEADTEK accepts the following on confirmed purchase orders:
Custom lengths beyond the listed 50–200 mm range
Non-standard thread forms (BSP, BSPT, NPT available; other standards on request)
Grade selection between SS304 and SS316 per line item - mixed grades within a single order are supported
Surface finish options - mill finish standard; polished finish available for food-grade or pharmaceutical applications
Why LEADTEK
ZHEJIANG LEADTEK FLUID TECHNOLOGY CO., LTD has manufactured stainless steel pipe fittings since 1994, operating from a 37,000 m² production base in Quzhou, Zhejiang, with 400+ CNC and casting machines. An in-house testing laboratory verifies dimensions and pressure performance before each shipment.
Quality certifications include ISO 9001, ISO 14001, and CE. Products are currently supplied to buyers in 80+ countries. For B2B procurement teams, we provide full material traceability documentation, support custom lengths on confirmed volume orders, and maintain a dedicated international sales team for pre-order technical review and post-shipment follow-up.
Related Products
For zero-clearance male-to-female connections where pipe offset is not required
Wrench-flat barrel for high-torque assembly in confined spaces
Elbows, tees, and couplings that mate directly with threaded nipple ends
For nipple-to-flange transition in higher-pressure line assemblies
FAQ
Q: What is the difference between a Long Pipe Nipple and a Close Nipple?
A: A close nipple is threaded along its entire length with no unthreaded body between the two ends, making it suited for zero-offset male-to-female connections. A Long Pipe Nipple has threads on one end only and an extended unthreaded barrel, which provides the clearance needed for insulation, structural spacing, or wrench access in tighter assemblies.
Q: What pressure rating does this fitting carry?
A: Pressure performance depends on pipe schedule, diameter, and operating temperature. Please share your working pressure, media type, and temperature range when submitting an inquiry - our technical team will confirm the appropriate wall thickness and grade for your application.
Q: Are these fittings compatible with NPT, BSP, and BSPT thread standards?
A: Yes. While the standard production run follows MFR STD, NPT, BSP, and BSPT thread forms are available on request for confirmed orders. State the required thread standard clearly when submitting your RFQ.
Q: What is the minimum order quantity?
A: MOQ varies by size and grade. Sample quantities are accepted for pre-qualification. Contact our sales team with your size list for a specific MOQ and lead time confirmation.
Q: Can LEADTEK provide material test reports and certificates of conformance with shipment?
A: Yes. Material test reports (MTR), dimensional inspection reports, and certificates of conformance are available as standard documentation. Third-party inspection can be arranged on request for large-volume orders.
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