Stainless Steel Ring Crimping Coupling

Product Description

The LIANHE Stainless Steel Ring Crimping Coupling is designed to join two compatible stainless steel pipes in water, gas and industrial piping systems. Its double-socket configuration provides a secure connection while maintaining a continuous and efficient flow path.

Manufactured from mechanically formed stainless steel pipe, the coupling combines dimensional accuracy, corrosion resistance and reliable sealing performance. The ring crimping connection also simplifies installation by reducing the need for conventional threading or on-site welding.

Core Technical Specifications

LIANHE ring crimping couplings are produced in multiple sizes and stainless steel grades to meet different piping and project requirements.

• Size Range: 1/2"–4" (DN15–DN100)

• Wall Thickness: 0.8–2.0 mm

• Applicable Standards: GB, EN, DIN and ASME

• Materials: SS304, SS304L, SS316 and SS316L

• Equivalent Grades: 0Cr18Ni9, S30408, SUS304, 1.4301, 0Cr17Ni12Mo2, S30403, 1.4306, S31603 and 1.4404

• Socket Connection: Ring crimping

• Nominal Pressure: PN16

• Hydrostatic Test Pressure: 2.5 MPa

• Airtightness Test Pressure: 1.05 MPa

• Gasket Temperature Range: −20°C to 110°C

• Manufacturing Process: Mechanically formed from stainless steel pipe

• Surface Treatment: Vibration polishing, magnetic polishing or pickling

• Applicable Media: Cold and hot drinking water, wastewater, industrial water, oil and gas

• Product Marking: Logo, outside diameter, wall thickness and material grade

• OEM Marking: Customer logo and customized marking available

• Brand: LIANHE

• Place of Origin: Wenzhou, China

• HS Code: 7307230000

Actual pressure, temperature and media compatibility should be confirmed according to the selected stainless steel grade, gasket, pipe size and applicable system standard.

Applications and Product Benefits

The coupling can be used to connect straight pipe sections in compatible water, gas, direct drinking-water, heating, air-conditioning, environmental protection and industrial water systems.

Typical applications include engineering projects, ships, commercial and residential buildings, hospitals, hotels and industrial facilities. For steam, oil, gas or other demanding media, confirm material and gasket compatibility before ordering.

Key Product Advantages

1. Structural strength: The mechanically formed body provides strength and dimensional stability for compatible piping installations.

2. Corrosion resistance: Multiple stainless steel grades are available for different operating environments.

3. Long service life: Durable stainless steel construction can reduce replacement and maintenance requirements.

4. Low flow resistance: The continuous internal passage helps support efficient fluid transmission.

5. Seismic performance: The mechanical joint is suitable for appropriately designed systems exposed to vibration or movement.

6. Environmental value: Stainless steel is durable and recyclable, supporting long-life piping installations.

7. Fast installation: Ring crimping reduces the need for conventional threading or on-site welding.

8. Concealed installation: The compact joint is suitable for exposed and embedded pipe layouts, subject to applicable requirements.

9. Cost efficiency: Faster installation and limited maintenance can reduce the overall piping-system cost.

10. Wear resistance: The stainless steel body offers durability under suitable operating conditions.

11. Hygienic applications: Compatible materials can be used in drinking-water systems that meet relevant sanitary requirements.

12. Reliable sealing: The correct pipe, gasket and crimping tool provide a secure and leak-resistant joint.

13. Consistent connection: The double-socket design helps maintain pipe alignment between two connected sections.

Quality Control and Testing

LIANHE applies in-process and final inspection procedures throughout production. Dedicated quality-control personnel inspect materials, dimensions, surfaces, sealing performance, marking and packaging before shipment.

Eight-Step Quality Control Process

1. Inspect the raw-material grade, outside diameter and wall thickness.

2. Check material length and pipe-end condition after cutting.

3. Inspect the socket, outside diameter and wall thickness after machining.

4. Examine the formed area, weld dimensions and surface condition where applicable.

5. Check the surface, dimensions and socket geometry after heat treatment.

6. Inspect the finished surface after polishing or pickling.

7. Perform the applicable hydraulic and airtightness tests.

8. Verify product markings, quantities and packaging before delivery.

Available Test Items

Testing may include hydrostatic, airtightness, pressure, negative-pressure, drawing, hot- and cold-water cycle, hydrostatic bending and torsion, vibration and impact tests.

Delivery inspection covers the material, surface finish, dimensions, hydrostatic performance and airtightness according to the applicable specification.

Inspection Documents

Subject to product and order requirements, available documentation may include:

• EN 10204 3.1 material test certificate

• Raw-material inspection certificate

• Radiographic test report

• Hydraulic sealing test report

• Dimensional inspection report

• Third-party inspection report

Listed company certifications include GB/T 19001-2016, ISO 9001:2015, CE and Sanitary License. Please confirm which certificates apply to the selected coupling and destination market.

Production Equipment and Factory Capability

Production equipment includes five automatic pipe-welding lines, two laser-cutting machines, five vibration-polishing machines, two magnetic-polishing machines, five airtightness and hydraulic-testing units, three forming machines, three grooving machines, two drilling machines, ten CNC lathes and six end-facing machines.

The facility also operates water-expansion, pipe-bending, automatic argon-arc welding, hydraulic drawing, high-speed punching, laser-marking and packaging equipment.

LIANHE supports customers with market-specific requirements, technical product selection, OEM marking, customized packaging, production management and commercially competitive quotations.

Packaging and Trading Terms

• Packing: Plastic bags, cartons and wooden cases

• MOQ: Generally 5–10 pieces

• Stock: Subject to the requested size, material and current inventory

• Samples: Free samples may be available; courier charges are not included

• Quotation Time: Normally within three hours after receiving complete requirements

• Price Validity: Generally 3–7 days, depending on material-market conditions

• Stock Delivery: Approximately 3–7 days for available regular sizes

• Production Lead Time: Approximately 25 days

• Payment: 30% T/T deposit and 70% balance before delivery; specific terms can be discussed

• Payment Methods: T/T, Western Union and PayPal

• Trade Terms: EXW, FOB, CFR, CIF, DDP and DDU

• Shipping: By sea, air or international express

• Warranty: Standard one-year quality warranty

For an accurate quotation, please provide the required size, wall thickness, material grade, quantity, operating medium, pressure, temperature, marking, packaging and destination.