About Beijing Zhonghaiwei Environment Engineering Co. Ltd. - Rubber Items Supplier in China

Beijing Zhonghaiwei Environment Engineering Co. Ltd. is based in Beijing, China and currently lists 21 active products across rubber items, flanges, metal products and related industrial components. The catalogue includes several types of rubber expansion joints, metal expansion joints, flexible hoses, braided corrugated hoses and rubber‑lined steel pipes, each identified with HS‑code families such as 7307 (metal bellows and expansion joints), 4009 (rubber hoses) and 7304 (steel pipe products). Materials referenced in the catalogue comprise stainless steel grades 304/316, carbon steel ASTM A105, ductile iron and natural or synthetic rubber reinforced with steel wire. The supplier’s product set reflects typical engineering‑grade components used in pipelines, chemical plants and HVAC systems.

The listed items cover single‑sphere and multi‑diameter rubber expansion joints (e.g., DN1000, DN3200, DN65), reinforced bellows, flanged metal expansion joints (e.g., DN900, DN1800) and a range of hoses with rubber or stainless‑steel construction. Two hose products carry HS code 4009.11 for natural/synthetic rubber with steel‑wire reinforcement and HS code 7307.99 for stainless‑steel braided corrugated hoses. The rubber‑lined steel pipe entries use HS code 7304.90 and HS code 4009.21, indicating steel pipe cores with Linatex or vulcanised rubber lining. All entries are presented without any asserted certifications or performance guarantees.

Product Range and Specialties of Beijing Zhonghaiwei Environment Engineering Co. Ltd.

The catalogue groups products by function: expansion joints (rubber‑filled or metal‑bellows), flexible hoses, and rubber‑lined piping. Rubber expansion joints are typically manufactured from EPDM or NBR compounds that resist oil, heat and ozone; pressure classes range from PN 10 to PN 40, and dimensions are defined by DN size (e.g., DN 40, DN 65, DN 1000). Metal expansion joints listed under HS 7307 use stainless‑steel 304/316 or carbon steel ASTM A105, conforming to API 617 or EN 13445 standards for high‑temperature, high‑pressure service. Flexible hoses with HS 4009.11 combine natural or synthetic rubber with steel‑wire reinforcement, a common construction for hydraulic and pneumatic lines, while the stainless‑steel braided corrugated hoses (HS 7307.99) meet ASTM A269 for corrosion resistance. Rubber‑lined steel pipes (HS 7304.90, 4009.21) employ Linatex or vulcanised rubber linings typically rated for internal pressures up to 1 MPa and temperatures up to 120 °C.

Trade and Export Information - Beijing Zhonghaiwei Environment Engineering Co. Ltd.

China is a major exporter of expansion joints, flexible hoses and rubber‑lined pipework, with shipments frequently destined for the Middle East, Southeast Asia, Europe and North America. The HS‑code 7307 series captures metal bellows and expansion joints, which are subject to customs inspections for material certification (e.g., mill test certificates) and often require CE marking or PED compliance for EU markets. HS 4009 products are classified as rubber hoses and usually need documentation proving compliance with REACH and, where applicable, ISO 9001 quality management. Standard export logistics involve 20‑foot or 40‑foot containers packed in wooden crates or bulk pallets, with Incoterms such as FOB Shanghai or CIF destination ports being common. Buyers typically request pre‑shipment inspection reports (e.g., SGS or Bureau Veritas) to verify material grades, pressure ratings and dimensional tolerances.

Sourcing from Beijing Zhonghaiwei Environment Engineering Co. Ltd. - Buyer Guidance

When sourcing from this supplier, buyers should request material test certificates for stainless‑steel (304/316) and carbon‑steel components, as well as rubber compound data sheets that state the EPDM or NBR grade, hardness (Shore A) and temperature limits. Verify that the expansion joints meet relevant standards such as API 617 for metal bellows or ISO 9001‑based quality procedures, and that hoses comply with ISO 4422 for reinforced rubber hoses. It is advisable to obtain 3‑D CAD drawings or detailed dimensional schematics, a hydrostatic test report at the intended working pressure, and confirmation of the applicable HS code for customs clearance before placing an order.

What pressure ratings are available for the rubber expansion joints listed?

The catalogue includes DN‑rated joints such as DN 40, DN 65, DN 1000 and DN 3200, which are typically supplied in pressure classes from PN 10 up to PN 40, depending on the rubber compound and reinforcement used.

Which material standards apply to the stainless‑steel bellows products?

Stainless‑steel bellows are supplied in grades 304 or 316 and conform to ASTM A240 for plate material and API 617 specifications for expansion joints used in high‑temperature and high‑pressure applications.

How can I verify the quality of the rubber‑lined steel pipes?

Request the mill test certificate for the steel pipe, the Linatex or vulcanised rubber lining data sheet, and a pressure test report that demonstrates compliance with the pipe’s design pressure, typically up to 1 MPa.

What documentation should I ask for before ordering the braided corrugated hoses?

Ask for the stainless‑steel material certificate (ASTM A269), the hose construction drawing, a dimensional tolerance report, and a third‑party inspection certificate confirming compliance with ISO 4422.

Are the flexible hoses suitable for oil‑based hydraulic systems?

The hoses with HS 4009.11 are made from natural/synthetic rubber reinforced with steel wire, a construction commonly approved for oil‑resistant hydraulic service when the rubber compound is specified as NBR or EPDM with appropriate oil‑compatibility ratings.

What are the typical packaging and shipping methods for these items?

Items are usually packed in wooden crates or bulk pallets, loaded into 20‑ft or 40‑ft containers. Export shipments from China often use FOB Shanghai or CIF terms, with moisture‑proof wraps for rubber components to prevent deformation during transit.

Which certifications are normally required for EU buyers of these products?

EU buyers generally request CE marking, PED compliance for pressure equipment, and conformity with REACH for chemical safety, in addition to ISO 9001 quality system certification from the supplier.

How long does lead time typically take for a custom‑size expansion joint?

Lead times for custom‑size expansion joints usually range from 30 to 45 days, depending on material availability, machining of flanges and the required hydrostatic testing schedule.