Size Range: 2”~8" (DN50~DN200)
Thickness:1~5MM
Standards: GB、 EN 、DIN 、ASME
Material: 0Cr18Ni9 SS304 S30408 SUS304 1.4301,,0Cr17Ni12Mo2 SS316 S31603 SUS316 1.4404,SS304L S30403 1.4306 ,SS316L S31603 1.4404.
Connection Mode of Socket End: Groove/Press-D Type and S Type;
Nominal pressure: PN16; Water pressure test:2.5MPa; Air tightness test pressure: 1.05MPa.
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The LIANHE Stainless Steel Groove-to-Press Reducer is designed to connect grooved and press-fit pipeline sections of different diameters. Its stainless steel construction provides corrosion resistance, structural strength, and reliable performance in commercial, residential, marine, and industrial piping systems.
Size Range: 2"–8" (DN50–DN200)
Wall Thickness: 1.0–5.0 mm
Applicable Standards: GB, EN, DIN, and ASME
Available Materials:
0Cr18Ni9, SS304, S30408, SUS304, and 1.4301
0Cr17Ni12Mo2, SS316, and SUS316
SS304L, S30403, and 1.4306
SS316L, S31603, and 1.4404
Connection Type: Groove × Press
Press Profiles: D-Type and S-Type
Nominal Pressure: PN16
Hydrostatic Test Pressure: 2.5 MPa
Airtightness Test Pressure: 1.05 MPa
Applicable Gasket Temperature Range: -20°C to +110°C
Manufacturing Process: Mechanically formed from stainless steel pipes
Surface Treatment: Vibration Polishing, Magnetic Polishing, or Pickling
Product Marking: LOGO–OD–W.T.–Material. Customized logos and markings are available.
Packaging: Plastic Bags, Export Cartons, and Wooden Cases
Certificates: GB/T 19001-2016, ISO 9001:2015, CE documentation for applicable products, and Sanitary License
Brand: LIANHE
HS Code: 7307230000
Place of Origin: Wenzhou, Zhejiang, China
Suitable media include drinking water, cold and hot water, wastewater, industrial water, oil, gas, and other compatible fluids.
Typical applications include:
Water supply and drainage systems
Gas piping systems
Direct drinking-water systems
Heating and air-conditioning systems
Industrial water pipelines
Environmental protection projects
Ships and marine installations
Commercial and residential buildings
Hospitals and hotels
Material, gasket, pressure, and temperature compatibility should be confirmed before installation.
High mechanical strength
Excellent corrosion resistance
Long service life
Low flow resistance
Good vibration and seismic performance
Reliable transition between different pipe sizes
Fast and convenient installation
Reduced on-site welding
Suitable for concealed installation where permitted
Low installation and maintenance costs
Good wear resistance
Dependable sealing performance
Available tests include:
Hydrostatic Pressure Test
Airtightness Test
Negative-Pressure Test
Pull-Out Test
Temperature-Cycling Test
Hydrostatic Bending and Torsion Test
Hydrostatic Vibration Test
Hydrostatic Impact Test
Delivery inspection covers material, surface condition, dimensions, connection ends, hydrostatic performance, airtightness, marking, and packaging.
Available documents include EN 10204 3.1 Material Test Certificates, raw-material certificates, hydraulic test reports, dimensional inspection reports, radiographic testing reports when applicable, and third-party inspection reports.
Inspect raw-material grade, outside diameter, and wall thickness.
Check material length and end condition after cutting.
Inspect groove, socket, outside diameter, and wall thickness after forming.
Check weld dimensions and surface quality where applicable.
Inspect dimensions and connection ends after heat treatment.
Verify surface quality after finishing.
Perform hydraulic-pressure and airtightness testing.
Check markings, quantities, and packaging before shipment.
Our factory is equipped with automatic pipe-welding lines, laser-cutting machines, forming and grooving machines, CNC lathes, polishing equipment, hydroforming equipment, pipe-bending machines, argon-arc welding machines, hydraulic testing units, laser-marking machines, and export-packaging equipment.
MOQ: Normally 5–10 pieces, depending on size and stock availability.
Free Samples: Available for standard products; express delivery charges are normally paid by the recipient.
Quotation Time: Normally within three working hours.
Quotation Validity: Normally 3–7 days, subject to market conditions.
Delivery Time: Approximately 3–7 days for regular products available from stock and approximately 25 days for new production.
Payment Terms: 30% T/T deposit and 70% balance before delivery. Western Union, PayPal, and other agreed payment methods are available.
Shipping Terms: EXW, FOB, CFR, CIF, DDP, and DDU. Delivery can be arranged by sea, air, land transportation, or international express.
Warranty: One year against confirmed manufacturing defects.
Manufacturer: LIANHE
Place of Origin: Wenzhou, Zhejiang, China





1. What is grooved fitting?
Grooved pipe fitting is a new type of steel pipe connection also known as clamp connection.
2. Will the grooved fittings leak after connection?
No,As long as the product is installed correctly, there will be no leakage problems.
3. What are the characteristics of grooved fittings?
The main feature of grooved pipe fittings is easy installation. They are suitable for occasions that require quick installation or disassembly. This connection method is simple to operate, labor-saving and has good sealing performance.
4. Has the product undergone a hydrostatic test?
Yes, all the products are hydrostatic tested before shipment.
5. What is the service life of groove fittings?
The average service life of grooved fittings is 70 years.
6. Has the product undergone annealing?
Yes.All products are annealed.
7. How are grooved fittings packaged?
All products are packed in three layers, namely plastic bags, cartons and wooden boxes.
8. What kind of payment method is commonly used?
We usually use 30% advance payment plus 70% payment before shipment,support T/T, Western Union, Paypal Etc.
Wenzhou Lianhe has its own efficient, united, hardworking and enterprising team. Our common goal is to focus on customer satisfaction.