Frequently Asked Questions

HengHaoSen supplies plastic piping systems and engineered wood panels to overseas markets. Our range covers PVC Schedule 40/80 and DWV fittings to U.S. standards, ABS DWV fittings, PP-R pipes and fittings, PVC hose, and OSB, fiberboard and particleboard panels.

Yes, we warmly welcome customer visits to our company and factory. Kindly confirm your visit time with us before you travel so we can arrange a suitable schedule.

We supply PVC, PP-R and ABS pipes and fittings, plastic valves, PVC hoses and engineered wood panels to North America, South America, Europe, Australia, Southeast Asia and many other regions.

PVC hose is produced in our own factory, with custom roll lengths available. Fittings are produced and stocked against U.S.-standard catalogs, and panels ship direct from our own lines with a monthly supply capacity of 10,000 m³.

Send us the product models or your project specification list together with the quantities, and we will quote by model, quantity and packing requirements. FOB Yantian, Nansha or other ports is standard; other trade terms are negotiable.

Yes. For project orders we prepare a detailed quotation covering material specifications, delivery schedule and a cost breakdown, so you can align it with your project plan.

PVC fittings are cataloged to ASTM standards: Schedule 40 fittings to ASTM D2466, Schedule 80 to ASTM D2467, PVC DWV to ASTM D2665 and ABS DWV to ASTM D2661. PP-R covers the S3.2/PN20 and S2.5/PN25 pressure classes, and OSB is graded to the EN 300 system (OSB2/OSB3/OSB4) with formaldehyde-free MDI bonding at E1/NAF emission class.

Yes. Our PVC pipes and fittings can be manufactured to ASTM (Schedule 40 and Schedule 80), ISO, DIN and other international standards, depending on the requirements of your market.

We follow strict quality-control procedures throughout production, including incoming raw-material inspection, pressure testing, impact testing and dimensional checks before shipment.

Yes. We can provide ISO certificates, ASTM compliance documents, material reports and other documents required for your market together with the quotation or shipment.

Yes. Our Schedule 40 fittings comply with ASTM D2466 and are fully compatible with U.S. plumbing and irrigation systems.

It depends on the product line: fittings typically start from 200 pieces, hose from 1,000–2,000 meters and panels from one 40HQ container. MOQs differ between in-stock and customized items, so please confirm with us before ordering.

Our standard terms are T/T with a 30% deposit and the 70% balance paid at the shipment stage. L/C can be arranged for some orders, subject to the contract.

In-stock items usually ship within 7–10 working days. Standard production orders usually take 15–25 days, and large project orders may need additional time depending on quantity and customization; the exact lead time is confirmed with your quotation.

We ship most orders from the Yantian, Nansha, Shunde and Guangzhou ports in China. For project orders, we can deliver in multiple shipments based on your project schedule.

We can arrange shipping and provide all the export documents you need. For customs clearance at destination, we recommend working with your local freight forwarder or broker.

Yes. We support both LCL and FCL shipments, depending on your order size.

Every shipment comes with the bill of lading, commercial invoice, packing list and certificate of origin, so you or your customs broker can clear the goods at destination without delay.

Yes. OEM supply is our core model for pipe fittings, with brand marking and packaging built to your specification. Retail-box and export packing are available for both fittings and hose.

Yes. Sizes and colors can be made to order, hose is supplied in custom roll lengths, and panel thickness can be selected within 6–40 mm. Please confirm the MOQ and lead time for customized items before placing your order.

Yes, samples are available on request. Sample and shipping costs are confirmed for each product and order situation, so simply contact us with the models you need.

Of course. Send us your project specification list, or just the application, size and pressure requirements. We size hose by inner diameter, working pressure and burst pressure, match fittings by U.S.-standard part numbers, and quote the selection once you confirm it.