A Pin Lug Coupling is a two-piece hose fitting system designed for medium-pressure fluid transfer, with a brass pin-ear nut and elastomeric seal for quick, secure hose coupling.
Technical Specifications
|
Item |
Specification |
|
Sizes |
1.0"–6.0" hose I.D. |
|
Threads |
NPSH & NPT male/female |
|
Pressure Rating |
80–150 PSI (5.5–10.3 Bar) |
|
Components |
Male/Female Shank, Brass Pin Nut, NBR Gasket |
|
Hose Compatibility |
PVC suction, lay-flat discharge, rubber hoses |
|
Retention |
Serrated shank, up to 450 kg pull resistance |
|
Temperature |
-20°C to +80°C |
Material & Seal Options
Aluminum: Reduces line weight for quick manual handling in low-pressure agricultural and water discharge lines.
Brass: Provides non-galling thread mating for durable, leak-free connection in general petroleum and municipal hoses.
304/316 Stainless Steel: 316 contains molybdenum to prevent chloride pitting in marine setups, while 304 offers cost-effective washdown durability.
NBR & EPDM Seals: NBR resists petroleum fluids (-30°C to 100°C); EPDM delivers zero-crack performance under outdoor UV and steam exposure.
Viton & PTFE Seals: Viton withstands aggressive aromatic hydrocarbons up to 200°C; PTFE ensures full chemical inertness for hazardous media.
Key Features
Dual Pin Lug Design
Raised brass pins enable fast manual leverage or standard spanner wrench tightening in tight spaces.Z
Recessed Gasket Pocket
Machined groove locks the seal in place to prevent blowouts during fluid pressure spikes.
Reinforced Shank Wall
Heavy-duty wall geometry prevents internal collapsing under high T-bolt clamp torque.
Customization & OEM Options
Custom Shank Configurations: Extended shank lengths tailored for double-clamp setups or crimped ferrule systems.
Thread Tailoring: Custom machining for BSPT, BSPP, NST/NH, and non-standard pitches per client engineering drawings.
Material Selection: Available in specialty bronze, hard-anodized aluminum, or 2205 duplex stainless steel for marine environments.
Laser Marking: Permanent laser etching for OEM part numbers, customer branding logos, and trace lot codes.
Manufacturing Capabilities
Precision CNC Machining
Multi-axis CNC lathes maintain dimensional concentricity within ±0.05 mm across sealing surfaces.
100% Thread Gauging
Threaded connections undergo 100% inspection using certified Go/No-Go plug and ring gauges before packing.
Hydrostatic Pressure Testing
Batch pressure testing conducted at 1.5x working pressure to ensure zero casting leakage.
CMM Verification
Dimensional CMM inspection reports and material hardness metrics provided with every batch.
Packaging
Polybagged couplings packed in 5-ply corrugated master cartons capped at 25 kg for safer handling.
Shipped on ISPM 15 heat-treated wooden pallets, shrink-wrapped with corner guards for ocean freight.
Standard bulk orders dispatch within 15 to 25 calendar days from order confirmation.
Compliance & Certifications
Raw Material Standards: Aluminum conforms to ASTM B26, brass to ASTM B16, and stainless steel to ASTM A351.
Quality System: Manufacturing facility operates under ISO 9001:2015 quality management systems.
Environmental Compliance: Fully compliant with EU RoHS 3 (Directive 2015/863) and REACH SVHC restrictions.
Pressure Equipment Alignment: Manufactured following Sound Engineering Practice (SEP) under European PED 2014/68/EU.
Traceability Documentation: Material Test Reports and Certificates of Conformance (CoC) included with shipment.
FAQ
Q: What is the warranty period for material or casting defects?
A: Coverage is 12 months from the shipment date for material or casting defects.
Q: Are the Material Test Reports and Certificates of Conformance issued in-house or by an accredited third-party lab?
A: Standard CoC documents are issued in-house against ASTM specifications, while third-party verification through SGS or Bureau Veritas is available as an optional add-on for an additional fee.
Q: What is the claims process if a coupling fails under rated pressure?
A: Buyers submit failure photos and the batch lot number within 30 days to trigger a root-cause review and replacement shipment.
Q: Does the PTFE seal option have a different temperature rating compared to the standard NBR or EPDM gaskets?
A: Yes, PTFE seals extend the operating range to -40°C to +200°C, significantly beyond the -20°C to +80°C rating of standard NBR/EPDM gaskets.
Q: Is there a different lead time for the larger 6" size compared to the standard 2" catalog size?
A: Yes, the 6" size requires dedicated CNC tooling runs and takes 22-25 days versus 15-18 days for in-stock 2" sizes.
