About Wenzhou Longwan Nanyang Steel Pipes Factory - Stainless Steel Tubes Supplier in China

China’s Wenzhou Longwan Nanyang Steel Pipes Factory lists five active stainless‑steel products. The catalogue includes stainless steel seamless pipe, welded pipe, rectangle tube, bright bar and capillary tubes. All items fall under the broader stainless‑steel tubes category. The capillary tubes are recorded with HS code 7306.40 and are supplied in grades 304, 304L, 316, 316L, 321 and 310. The remaining four products are described without specific HS codes in the provided data.

The supplier’s product set targets applications that require corrosion‑resistant steel. Seamless and welded pipes are typical for pressure‑bearing lines, while rectangle tubes and bright bars serve structural and fabrication needs. Capillary tubes, identified by the 7306.40 code, are used where precise fluid control is required. The listed grades cover a range from austenitic 304 series to higher‑alloy 310. No additional company history or capacity figures are supplied.

Product Range and Specialties of Wenzhou Longwan Nanyang Steel Pipes Factory

The catalogue offers stainless steel seamless pipe, welded pipe, rectangle tube, bright bar and capillary tube. In the industry, seamless pipes are commonly produced to ASTM A312 or EN 10217 standards, with diameters from 6 mm up to 600 mm and wall thicknesses ranging 1 mm to 30 mm. Welded pipes follow ASTM A53 or EN 10220 and are typically supplied in the same diameter range but with welded seams. Rectangle tubes are often supplied in dimensions such as 50 × 30 mm to 300 × 200 mm, with tolerances of ±0.5 mm, and bright bars are rolled to lengths of 6 m with surface finishes classified as “bright” or “pickled”. Capillary tubes are precision‑drawn, usually with inner diameters of 0.1 mm to 5 mm, outer diameters up to 10 mm, and are graded according to the stainless‑steel grades listed.

Typical grades for these products include 304/304L for general corrosion resistance, 316/316L for marine and chemical environments, 321 for high‑temperature service, and 310 for elevated temperature applications. Buyers often request compliance certificates to ASTM, EN, or ISO standards and may specify surface roughness (Ra ≤ 0.8 µm for bright bar). The material composition for the capillary tubes aligns with the grades noted in the facts, and the HS code 7306.40 classifies them under “Other tubes, pipes and hollow profiles of iron or steel”.

Trade and Export Information - Wenzhou Longwan Nanyang Steel Pipes Factory

China is among the world’s largest exporters of stainless‑steel tubes and related profiles, supplying markets in Southeast Asia, the Middle East, Europe and North America. The HS chapter 73 family, especially code 7306.40 for capillary tubes, is routinely inspected under customs regimes that may require a mill test report, country of origin certificate and compliance with relevant standards such as ISO 9001. Export shipments are typically loaded in 20‑ft or 40‑ft containers, with bulk loads on flat‑rack trucks for oversized pipe lengths.

Importers of stainless‑steel pipe products usually request certifications like ISO 9001 quality management, CE marking for EU markets, and PED certification for pressure equipment. Additional documentation often includes ASTM/EN compliance certificates, chemical analysis reports, and a packing list indicating dimensions and weight. Common Incoterms are FOB Wenzhou or CIF destination port, and freight is planned according to the weight (often 7‑8 t per 40‑ft container) and length of the steel items.

Sourcing from Wenzhou Longwan Nanyang Steel Pipes Factory - Buyer Guidance

When sourcing from Wenzhou Longwan Nanyang Steel Pipes Factory, buyers should request mill test reports that detail chemical composition for the listed grades (304, 304L, 316, 316L, 321, 310). Verification of dimensions, wall thickness tolerances and surface finish against ASTM A312 or EN 10220 standards helps confirm suitability for pressure or structural applications.

For the capillary tubes, the HS code 7306.40 should be confirmed on the commercial invoice, and buyers typically ask for a certificate of conformity to the specified grade. Requesting ISO 9001 certification, if available, and a sample batch for mechanical and corrosion testing is standard practice before finalizing large orders. Clarify packaging (e.g., wooden crates with protective film) and lead time expectations, which in China often range from 2 weeks for standard sizes to 4‑6 weeks for custom dimensions.

What stainless‑steel grades are offered for the pipe and tube products?

The supplier lists grades 304, 304L, 316, 316L, 321 and 310 for its stainless‑steel items, matching the grades noted for the capillary tubes and commonly applied to the other pipe and tube types.

Which HS code applies to the capillary tubes?

The capillary tubes are recorded under HS code 7306.40, which covers other tubes, pipes and hollow profiles of iron or steel.

What standards govern the seamless and welded pipes?

Seamless pipes are typically manufactured to ASTM A312 or EN 10217, while welded pipes follow ASTM A53 or EN 10220, providing defined dimensions, pressure ratings and tolerance levels.

What documentation should be requested before purchase?

Buyers should ask for a mill test report, chemical analysis certificate, compliance certificates to ASTM/EN standards, and, if available, ISO 9001 quality‑management certification.

How are the products packaged for export?

Standard export packaging includes wooden crates or steel bundles with protective film, sized to fit 20‑ft or 40‑ft containers; oversized lengths may be shipped on flat‑rack trucks.

What is the typical lead time for orders from this supplier?

Lead times in China generally range from two weeks for standard dimensions to four‑six weeks for custom‑size stainless‑steel tubes or capillary tubes.

Which markets commonly import Chinese stainless‑steel tubes?

Major import regions include Southeast Asia, the Middle East, European Union countries and North America, where the products are used in oil & gas, construction, automotive and chemical processing sectors.

How can I request a sample of the stainless steel products?

Samples can be requested by contacting the supplier with the specific product name, grade and dimensions; a small quantity is usually shipped in a protective package and accompanied by a test report confirming the material specifications.