The King Combination Nipple (KC Nipple) is a heavy-duty transition fitting used to connect rigid threaded piping or equipment directly to flexible rubber and industrial hose lines.
Size Availability
|
Dimension |
Carbon Steel |
Stainless Steel 316 |
Stainless Steel 304 |
Aluminum |
|
DN15 (1/2") |
✓ |
✓ |
✓ |
✓ |
|
DN20 (3/4") |
✓ |
✓ |
✓ |
✓ |
|
DN25 (1") |
✓ |
✓ |
✓ |
✓ |
|
DN32 (1-1/4") |
✓ |
✓ |
✓ |
✓ |
|
DN40 (1-1/2") |
✓ |
✓ |
✓ |
✓ |
|
DN50 (2") |
✓ |
✓ |
✓ |
✓ |
|
DN63 (2-1/2") |
✓ |
✓ |
✓ |
✓ |
|
DN75 (3") |
✓ |
✓ |
✓ |
✓ |
|
DN100 (4") |
✓ |
✓ |
✓ |
✓ |
|
DN125 (5") |
✓ |
✓ |
✓ |
- |
|
DN150 (6") |
✓ |
✓ |
✓ |
- |
|
DN200 (8") |
✓ |
- |
- |
- |
|
DN250 (10") |
✓ |
- |
- |
- |
|
DN300 (12") |
✓ |
- |
- |
- |
Technical Specifications
|
Item |
Specification |
|
Material |
SS316/SS316L, SS304, Carbon Steel, Aluminum |
|
Casting Method |
Silica Sol Investment Casting |
|
Size Range |
DN15–DN150 (1/2"–6") |
|
Thread Type |
NPT / BSPT |
|
Working Pressure |
Max. 15 bar (215 PSI) |
|
Temperature Range |
-40°C to +200°C |
|
Surface Finish |
CNC Machined, Ra 3.2 µm |
Key Benefits
Leak-Free Pressure Retention: Dense casting microstructure prevents internal porosity and wall weeping under continuous working pressure.
Galling Reduction: Precision-machined NPT/BSPT threads ensure full engagement depth, minimizing thread galling and torque requirements during installation.
Enhanced Blowout Safety: Multi-serrated barb profile grips the hose tube inner wall to prevent connection blow-off during pressure surges.
Applications & Connection Compatibility
Industrial Utility Lines
Connects rigid steel header piping to flexible rubber hoses for cooling water, lube oil, and plant compressed air systems.
Chemical Handling
Connects fluid lines between transfer pumps, storage tanks, and flexible PTFE or PVC hose assemblies.
Construction & Dewatering
Pairs pump discharge ports with lay-flat hoses for slurry extraction, flood mitigation, and site dewatering.
Marine & Offshore Utilities
Links vessel utility stations with washdown and bunkering hoses in harsh salt-spray environments.
Customization & OEM Capability
Custom barb profiles, extended shank lengths, and smooth collars designed for hydraulic crimp ferrules.
OEM options for NPSM straight pipe threads, metric pitches, and extended thread engagement lengths.
Custom branding, part numbers, pressure ratings, and material heat numbers etched directly on the fitting hex/body.
Optional electro-polishing and chemical passivation tailored to high-purity processing requirements.
Testing
Material Verification: Optical Emission Spectrometry (OES) verifies alloy chemistry for every heat lot, with EN 10204 3.1 MTRs provided.
100% Thread Inspection: Male threads are individually checked using calibrated GO/NO-GO ring gauges per ANSI B1.20.1 and ISO 7-1.
Hydrostatic Proof Testing: Production batch samples undergo hydraulic pressure testing at 1.5 times the maximum working pressure rating.
Corrosion Resistance Testing: Acid passivation and salt-spray testing comply with ASTM standards to ensure maximum corrosion protection.
Packaging
Items are sealed in polybags, packed in heavy-duty 5-ply cartons (max 20 kg each), and secured on ISPM 15 heat-treated wooden pallets.
Standard inventory supports trial orders starting from 50 pieces per size.
Stocked items ship within 7 days; OEM production runs are dispatched in 20–30 days under EXW, FOB, CIF, or DDP terms.
FAQ
Q: How can we obtain a formal price quotation?
A: Formal quotations are issued within 24-48 hours of receiving size, material, and quantity specifications.
Q: What are the standard payment terms for orders?
A: Standard terms are 30% T/T deposit with 70% balance before shipment, or L/C at sight for orders above 5,000 units.
Q: Does production lead time differ between stainless steel 316 and carbon steel versions of the same size?
A: Yes, SS316 typically requires 25-30 days due to longer raw material procurement, while carbon steel versions in the same DN size can ship in 18-22 days.
Q: Is the aluminum version rated for the same 15 bar working pressure as steel and stainless steel versions?
A: No, aluminum fittings are rated to a lower maximum working pressure of 10 bar (145 PSI) due to the material's reduced tensile strength compared to steel alloys.
Q: What happens if a batch fails the hydrostatic proof test or GO/NO-GO thread inspection after arrival?
A: Buyers must submit a claim with photo/video evidence and the batch heat number within 15 days of arrival, after which a credit note or free replacement is issued within 10 business days upon verification.
