About JW Group - Stainless Steel Tubes Supplier in China

China‑based JW Group lists ten active products across steel tubing, actuators and hydraulic equipment. The catalogue covers stainless steel seamless AP tubes, carbon steel honed tubes, welded coil tubes, chrome‑plated rods and various hydraulic and pneumatic actuators, each mapped to HS chapters 73 (iron and steel) and 84 (machinery). Top categories include stainless steel tubes, steel tubes, gas tubes, industrial cylinders, electronic actuators, stainless steel rods & strips, welding wires & supplies, and hydraulic equipments. The supplier’s product list references specific HS codes such as 7304.11 for stainless steel seamless AP tubes, 7304.51 for seamless carbon‑alloy tubes, 8481.80 for linear actuators, 7228.30 for chrome‑plate rods and 7306.40 for stainless steel tubes. These codes align with standard customs classifications used for bulk steel and mechanical components worldwide.

Product Range and Specialties of JW Group

The JW Group catalogue contains stainless steel seamless AP tubes made from TP 304/304L, 316/316L, 321 and duplex grades, as well as carbon‑alloy seamless tubes (ST52, 20MnV6, E355) and honed variants. Industry practice for these grades follows ASTM A312/A213 for seamless pipes and EN 10216‑2 for welded tubes, with typical wall thicknesses from 2 mm to 20 mm and diameters up to 508 mm. Hydraulic cylinders and pneumatic actuators listed are generally built to ISO 6020 pressure‑class standards, with cylinder bore sizes ranging from 25 mm to 200 mm and working pressures up to 350 bar. Linear actuators with aluminum or steel housings and copper windings conform to IEC 60204‑1 safety standards, while chrome‑plated CK45 rods meet ASTM A108 surface‑hardness specifications. Buyers often request mill test certificates, dimensional inspection reports and surface‑finish grades (e.g., Ra ≤ 0.8 µm for stainless tubes).

Trade and Export Information - JW Group

China is a leading exporter of steel tubes and hydraulic components, with major destinations in Southeast Asia, the European Union, the Middle East and North America. HS 7304 covers seamless and welded steel tubes, while HS 8481 includes linear actuators; customs authorities in importing countries frequently require CE marking, ISO 9001 quality‑system certification and, for pressure equipment, compliance with PED (EU) or ASME standards. Typical packaging involves wood‑crate pallets for tubes and drums or wooden crates for hydraulic cylinders, sized for 20‑ft or 40‑ft containers. Incoterms most often used are FOB Shanghai or CIF destination port, allowing buyers to arrange inland transport and customs clearance. Export documentation from China normally includes commercial invoice, packing list, certificate of origin and, where requested, a third‑party inspection report (e.g., SGS or Bureau Veritas).

Sourcing from JW Group - Buyer Guidance

When sourcing from JW Group, buyers should request mill test certificates that detail chemical composition, mechanical properties and heat‑treatment records for each steel grade. For actuators and hydraulic cylinders, a pressure‑test report and conformity to ISO 6020 or EN 12535 should be verified before shipment. Sample orders of 5 - 10 m of tube or a single actuator unit are common practice to confirm dimensions, surface finish and functional performance. Buyers are advised to confirm the HS code on the commercial invoice matches the product description to avoid customs delays, and to ensure that any required certifications (CE, ISO 9001, PED) are presented prior to loading.

What steel grades are available for the stainless steel seamless AP tubes?

JW Group lists TP 304/304L, 316/316L, 321 and duplex grades. These correspond to the common ASTM A312 specifications used for food‑grade, chemical‑process and high‑temperature applications.

Which HS code applies to the carbon‑alloy seamless tubes?

The carbon‑alloy seamless tubes are classified under HS 7304.51, which covers seamless carbon‑steel tubes and pipes.

Are mill test certificates provided for the stainless steel rods?

Mill test certificates are standard for the chrome‑plate rods (HS 7228.30) and should include chemical analysis, hardness (HRB ≥ 70) and dimensional tolerances.

What certifications are typically required for the hydraulic cylinders?

Importers usually request ISO 9001 quality‑system certification and compliance with ISO 6020 pressure‑class standards; for EU markets, the Pressure Equipment Directive (PED) certification may also be needed.

What is a common lead time for the linear actuators with limit switch?

Lead times for the 8481.80 linear actuators range from 4 to 6 weeks, depending on the required customization and testing schedule.

How are the tubes packaged for export?

Stainless steel and carbon‑steel tubes are typically packed in wooden crates with internal bracing, placed on standard 20‑ft or 40‑ft containers to prevent deformation during transit.

What documentation should a buyer request before shipment?

Buyers should ask for a commercial invoice, packing list, certificate of origin, mill test certificate, and any applicable third‑party inspection report such as SGS or BV.

Is a sample of the welded coil tube available?

Samples of welded coil tube can be requested, usually in lengths of 2 m to 5 m, to verify weld quality, dimensional accuracy and surface finish before placing a bulk order.