Extended Barrel Nipple
Product Details
Zhejiang Leadtek Fluid Technology Co., Ltd. is one of the most experienced manufacturers and suppliers of extended barrel nipple in China. Please feel free to buy customized extended barrel nipple at competitive price from our factory. Also, free sample is available.
Product Overview
Forged Male Female Adapter connections in compact manifold assemblies and flanged equipment often demand a longer threaded section than a standard nipple provides - this is the gap the Extended Barrel Nipple is engineered to fill. Manufactured to ISO 4144, this fitting features BSP male threads on both ends with a plain, unthreaded barrel at the center. The extended body gives installers a reliable wrench-grip zone between two ports, eliminating the risk of thread damage during makeup and allowing correct torque to be applied without contact with the thread form.
At Leadtek, each piece starts from SS304 or SS316 round tube, CNC-machined to dimensional tolerances traceable to the ISO 4144 standard. Thread form and engagement length are gauge-verified before shipment.
Specifications
| Parameter | Details |
|---|---|
| Product Code | 31-2A011 |
| Standard | ISO 4144 |
| Material | SS304 / SS316 |
| Size Range | 1/8″ – 4″ (DN6 – DN100) |
| Available Lengths (L) | 50 / 75 / 100 / 150 / 200 mm |
| Thread Type | BSP / BSPT / NPT (specify on inquiry) |
| Tolerance | 1/8″–2″: ±1 mm; 2½″–4″: ±1.5 mm |
| Surface | Pickled & passivated (standard); polished on request |
Size-to-Dimension Reference Table:
| Size T1 | DN | L (mm) | ØD (mm) | t (mm) |
|---|---|---|---|---|
| 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 | 75, 100, 150, 200 | 33.4 | 3 |
| 1¼″ | 32 | 75, 100, 150, 200 | 42 | 3 |
| 1½″ | 40 | 75, 100, 150, 200 | 48 | 3 |
| 2″ | 50 | 75, 100, 150, 200 | 60 | 3.5 |
| 2½″ | 65 | 100, 150, 200 | 76 | 4 |
| 3″ | 80 | 100, 150, 200 | 89 | 4.5 |
| 4″ | 100 | 100, 150, 200 | 114 | 5 |
Custom lengths available on request.
Design & Construction
Unthreaded grip barrel
The center section of each Long Thread Pipe Nipple is left plain, giving a secure wrench seat between the two threaded ends. Thread profiles are not exposed to tong or pipe-wrench jaw pressure, preserving the seal surface for the service life of the fitting.
Full-depth thread engagement
Both ends are threaded to ISO 4144, providing the complete engagement length that flanged connections and valved assemblies require. This removes the need for additional extension nipples or adapters in most inline configurations.
Wall thickness sized by nominal bore
The t value steps up as diameter increases - from 2 mm at DN6 to 5 mm at DN100 - maintaining consistent burst and working-pressure margins across the size range.
Dual material grade
SS304 covers the majority of water, steam, compressed-air, and mild-chemical services. SS316 (with 2–3% molybdenum) is specified where chloride exposure, seawater, or acidic process media would cause localised pitting in 304.
Typical Applications
The Standard Long Nipple suits B2B procurement across process-critical industries:
Industrial fluid systems
Inline connections between valves, instruments, and pipe headers where thread engagement length governs joint integrity
Petrochemical & oil/gas
Gauge taps, vent connections, and pressure-instrument standoffs on process vessels
Water treatment & fire protection
Manifold and sprinkler-header assemblies using BSP-threaded components
Food, beverage & pharmaceutical
CIP circuit connections requiring full-bore, crevice-free internal geometry (polished finish available)
New energy (energy storage, photovoltaics)
Cooling-loop interconnects in battery cabinets and inverter skids, where compact corrosion-resistant fittings reduce maintenance intervals
Marine & offshore
Seawater-exposed pipework on vessels and platforms, where SS316 grade resists chloride-induced pitting over long service cycles
From the Industry
Demand for precision-threaded stainless fittings - including the Forged Male Female Adapter category - is rising in energy storage and semiconductor fabrication, as detailed in Leadtek Fluid's industry coverage: leak-free performance over extended service intervals is now a procurement requirement rather than an option, and the extended barrel geometry directly addresses that specification. (Learn more on Leadtek News)
Why Source from Leadtek Fluid
30+ years of manufacturing depth. Our founder began in stainless steel casting in Wenzhou in 1994. Today, Zhejiang Leadtek Fluid Technology Co., Ltd. operates from a 37,000 m² production base in Quzhou, Zhejiang - 400+ CNC machines, 300+ workers, fully integrated from casting through assembly and testing.
In-house quality verification
Thread gauges, hydrostatic pressure tests, and dimensional checks are conducted in our laboratory with 20+ specialized instruments. No unit ships without traceable inspection records.
Certifications
ISO 9001, ISO 14001, CE. Recognized High-Tech Enterprise with 40+ national patents. Material test reports (MTR/EN10204 3.1) available on request for critical-service orders.
Proven global supply
Products shipped to 80+ countries across Europe (Germany, Italy, UK), Asia-Pacific (South Korea, Japan, Singapore), and the Middle East (Saudi Arabia, Turkey). Leadtek participated in 17 international exhibitions in 2024, demonstrating sustained commitment to global B2B markets.
OEM and custom service
Non-standard barrel lengths, alternate thread forms, special surface treatments, and private-label packaging are available. Minimum order quantities and lead times confirmed at the inquiry stage.
Packaging & Shipping
Each Extended Barrel Nipple is packed by size and length into reinforced corrugated cartons with moisture-barrier inner bags, preventing thread damage and surface contact during sea freight. Polished-finish units are individually foam-sleeved before carton packing. Each carton is labeled with product code, material grade, size, quantity, and heat number reference; custom branding and OEM labeling are available on request.
Shipments are dispatched daily from Ningbo / Shanghai port. Standard sizes ship within 7–15 days of order confirmation; custom barrel lengths or non-standard thread forms typically require 20–30 days. Both FCL and LCL are supported, and ISPM 15-compliant fumigated pallets are available for markets that require them.
FAQ
Q: What is the difference between an Extended Barrel Nipple and a standard close nipple?
A: A close nipple has threads running nearly the full length with minimal or no unthreaded center section, making it difficult to grip with a wrench without damaging the threads. The Extended Barrel Nipple provides a plain center barrel long enough for a full pipe-wrench or spanner seat, which is the critical advantage in confined installations or high-torque makeup situations.
Q: Can the Long Barrel Pipe Nipple be used in high-temperature steam lines?
A: SS304 is rated for continuous service up to approximately 425°C in dry steam conditions. For wet steam or steam combined with corrosive condensate, SS316 is the preferred grade. The actual pressure-temperature rating depends on nominal size and wall thickness - we recommend confirming the schedule and working conditions with our technical team before specifying for steam service above 200°C.
Q: Do you provide material test reports (MTR) for traceability?
A: Yes. EN 10204 Type 3.1 material test reports are available on request for all stainless steel grades. Chemical composition and mechanical property data are traceable to the specific heat used in production. This is standard practice for orders destined for petrochemical, offshore, or pharmaceutical applications where full material traceability is a procurement requirement.
Q: What is the minimum order quantity (MOQ) for custom barrel lengths?
A: For standard lengths (50 / 75 / 100 / 150 / 200 mm) across the full size range, there is no enforced MOQ for most sizes. For non-standard barrel lengths or special thread forms, MOQ is determined at the inquiry stage based on the size and machining setup involved. Sample quantities for qualification testing can typically be arranged before a full production order is committed.
Q: How should the Extended Barrel Nipple be installed to ensure a leak-free joint?
A: Thread sealant or PTFE tape should be applied to the male threads before makeup. Hand-tighten first to confirm thread alignment, then apply wrench torque to the unthreaded center barrel - never to the thread itself. Tighten to the torque value appropriate for the pipe size and sealant type used. Over-tightening ISO taper threads can crack female ports; follow the fitting manufacturer's torque guideline or your system's standard installation procedure.
Hot Tags: extended barrel nipple, China extended barrel nipple manufacturers, suppliers, factory
Previous
No InformationNext
Long Pipe NippleSend Inquiry
