Stainless Steel Water Pipe

Technical Specifications

Size Range: 1/4"–8" (DN10–DN200)

Wall Thickness: 0.6–5.0 mm

Applicable Standards: GB/T 19228.1-2011, 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

Available Sealing-Ring Materials: CIIR, EPDM, PTFE, and NBR

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: ERW and Welding

Surface Treatment Options: Vibration Polishing, Magnetic Polishing, and Pickling

Product Marking: LOGO–OD–W.T.–Material. Customer logos, private brands, batch information, and other customized markings can be applied according to specific requirements.

Standard 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

The actual working pressure and temperature limits depend on the product size, wall thickness, stainless steel grade, sealing-ring material, transported medium, connection structure, and applicable project standard.

Applicable Media

The products can be supplied for use with compatible liquid and gaseous media, including:

• Drinking water

• Cold water and hot water

• Wastewater

• Industrial water

• Oil and compatible liquid media

• Gas and compatible gaseous media

Before ordering, customers should confirm the compatibility of the stainless steel grade and sealing-ring material with the transported medium, operating temperature, system pressure, and expected service life.

For drinking water, gas, oil, steam, chemicals, or other specialized media, additional testing, certification, or project-specific documentation may be required.

Application Areas

The products can be used in a variety of commercial, residential, marine, industrial, and infrastructure projects, including:

• Engineering and infrastructure projects

• Ships and marine piping installations

• Commercial buildings

• Residential buildings

• Hospitals and medical facilities

• Hotels and public facilities

• Environmental protection equipment

• Water-treatment systems

• Heating installations

• Air-conditioning systems

• Industrial processing facilities

They may be applied in water supply systems, direct drinking-water pipelines, gas distribution systems, wastewater systems, environmental protection pipelines, steam systems, heating networks, air-conditioning pipelines, and industrial water systems.

The final product configuration should be selected according to the working pressure, temperature, transported medium, material grade, wall thickness, sealing-ring material, connection structure, and local project requirements.

Product Advantages

1. High mechanical strength and structural stability

2. Excellent corrosion and oxidation resistance

3. Long operating service life

4. Low internal flow resistance

5. Good vibration and seismic performance

6. Reliable connection performance

7. Durable and recyclable stainless steel construction

8. Fast and convenient installation

9. Suitable for concealed installation where permitted

10. Reduced overall installation and maintenance costs

11. Good resistance to wear and deformation

12. Hygienic construction for suitable drinking-water systems

13. Dependable sealing performance with reduced leakage risk

Correct pipe preparation, product alignment, sealing-ring selection, component assembly, tool calibration, and final inspection are essential for reliable performance.

The suitability of concealed installation should be evaluated according to local building regulations, access requirements, maintenance conditions, and the design of the complete piping system.

Sealing-Ring Options

Available sealing-ring materials include CIIR, EPDM, PTFE, and NBR. Each material provides different levels of temperature resistance, chemical compatibility, elasticity, and long-term sealing performance.

The appropriate sealing-ring material should be selected according to:

• Transported medium

• Operating temperature

• Working pressure

• Chemical concentration

• Drinking-water or hygiene requirements

• Expected service life

• Installation environment

The stated temperature range of -20°C to +110°C is a general reference. The actual permissible range should be confirmed according to the selected gasket material, medium, system pressure, and service conditions.

Product Testing

Available testing procedures include:

• Hydrostatic Pressure Test

• Airtightness Test

• Working Pressure Test

• Negative-Pressure Test

• Pull-Out Test

• Cold- and Hot-Water Temperature-Cycling Test

• Hydrostatic Bending and Torsion Test

• Hydrostatic Vibration Test

• Hydrostatic Impact Test

The applicable testing items and sampling ratio depend on the selected specification, governing standard, intended application, and confirmed inspection plan.

Delivery Inspection

Products are inspected before shipment. Standard delivery inspection covers:

• Stainless steel material grade

• Outside diameter and wall thickness

• Product dimensions and tolerances

• Connection-area dimensions

• Internal and external surface condition

• Weld appearance, where applicable

• Hydrostatic performance

• Airtightness performance

• Product markings

• Quantities and packaging

Additional inspection items can be arranged according to the applicable standard and project requirements.

Factory Inspection Reports and Certificates

Inspection reports and supporting quality documents can be supplied according to the confirmed product and order requirements, including:

• EN 10204 3.1 Material Test Certificate

• Raw-Material Inspection Certificate

• Radiographic Testing Report, when applicable

• Hydraulic Test Report

• Dimensional Inspection Report

• Weld Inspection Report, where applicable

• Pressure and Airtightness Test Report

• Third-Party Inspection Report

• Other project-specific quality documents

The required inspection scope, testing ratio, documentation, and third-party witnessing arrangements should be confirmed before production.

Product Quality Control

LIANHE applies in-process and final inspection procedures throughout raw-material preparation, cutting, machining, forming, welding, heat treatment, surface finishing, testing, marking, and packaging.

The principal quality-control procedures include:

1. Inspecting the outside diameter, wall thickness, material grade, documentation, and surface condition of incoming raw materials.

2. Checking the length, cutting position, and end condition of raw materials after cutting.

3. Inspecting the connection areas, outside diameter, wall thickness, and other critical dimensions after machining and forming.

4. Checking weld dimensions, weld appearance, alignment, and surface quality after welding and forming.

5. Inspecting the surface, dimensions, and connection areas after heat treatment, where applicable.

6. Verifying surface quality after vibration polishing, magnetic polishing, pickling, or other surface treatment.

7. Performing hydraulic-pressure and airtightness tests according to the applicable inspection requirements.

8. Inspecting product markings, quantities, packaging materials, labels, and shipping marks before shipment.

Products are approved for delivery after completing the applicable inspection procedures.

Production Equipment

Our manufacturing facility is equipped with five automatic pipe-welding production 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-processing machines.

Additional equipment includes two vertical hydroforming machines, two frame-type hydroforming machines, ten pipe-bending machines, eight automatic argon-arc welding machines, four hydraulic drawing machines, four high-speed hydraulic punching machines, two laser-marking machines, two packaging units, and other related production and inspection equipment.

These production capabilities support raw-material preparation, ERW processing, cutting, forming, welding, heat treatment, surface finishing, testing, marking, inspection, and export packaging.

Packaging

Each product is protected with a plastic bag to reduce exposure to moisture, dust, and surface contamination.

Products are then packed in reinforced export cartons and consolidated in wooden cases when required.

Customized cartons, customer logos, labels, barcodes, pallet packing, and other export packaging arrangements can be provided according to confirmed requirements.

Payment Terms

Our standard payment term is a 30% T/T deposit paid in advance, with the remaining 70% T/T balance paid before delivery. Specific payment conditions can be discussed according to the order value and cooperation requirements.

Available payment methods include:

• T/T bank transfer

• Western Union

• PayPal

• Other mutually agreed payment methods

Shipping Terms

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

Products can be delivered by:

• Sea freight

• Air freight

• Land transportation

• International express service

The shipping method can be selected according to the order quantity, package volume, destination, required delivery schedule, and transportation budget.

Minimum Order Quantity and Stock

Minimum Order Quantity: Normally 5–10 pieces, depending on the product specification and current inventory.

We maintain inventory for many regular products and commonly requested sizes. Selected products may have up to 5,000 pieces available. Because inventory levels change continuously, actual quantities and immediate-delivery availability should be reconfirmed when requesting a quotation.

Samples and Quotation

Free Samples: Samples may be provided free of charge for dimensional verification and quality evaluation. International express delivery charges are normally paid by the recipient.

Quotation Time: Normally within three working hours after receiving complete specifications and quantity requirements.

Quotation Validity: Normally 3–7 days, subject to stainless steel raw-material prices, exchange rates, and current market conditions.

Delivery Time

Regular-size products available from stock can normally be delivered within 3–7 days.

Orders requiring new production normally take approximately 25 days. The actual delivery schedule depends on the selected specification, material availability, order quantity, inspection requirements, packaging, and current factory production plan.

After-Sales Service

Our standard product quality warranty period is one year.

If a manufacturing-related quality problem is confirmed during the warranty period, our team will investigate the cause and provide an appropriate technical or after-sales solution.

Customers should provide the order number, product specification, material grade, wall thickness, installation conditions, operating pressure, working temperature, transported medium, and relevant photos or videos to assist with technical evaluation.

Our Services

1. Extensive knowledge of international markets and the ability to support different technical and commercial requirements.

2. Direct manufacturing from our own factory in Wenzhou, Zhejiang, China.

3. An experienced technical and production team focused on maintaining consistent product quality.

4. Effective production and cost-control systems designed to provide competitive factory pricing.

5. Extensive experience in production, quality management, export packaging, and international sales.

Brand: LIANHE
Place of Origin: Wenzhou, Zhejiang, China