About Qingdao Wanfengyuan Piping Systerm Company Limited - Flanges Supplier in China

Based in China, Qingdao Wanfengyuan Piping Systerm Company Limited lists five active products within its catalogue. All items fall under the flange category and include a stainless‑steel (SS) flange, a DIN‑standard flange, a forged flange, a general flange, and an anchor flange. The DIN, forged, general, and anchor flanges are recorded under HS code 7307.19, while the anchor flange carries HS code 7307.91. Materials specified range from carbon steel (ASTM A105) to stainless steel grades 304, 316 and 316L, as well as alloy steel variants.

The supplier’s product set covers both carbon‑steel and stainless‑steel options, with the anchor flange also offered in ASTM A350 LF2. These flanges are typical components for piping systems used in pressure‑bearing applications. Each product description references the material standards and HS‑code families, providing buyers with clear information on tariff classification and material composition for import compliance.

Product Range and Specialties of Qingdao Wanfengyuan Piping Systerm Company Limited

The catalogue presents five flange types: SS flange, DIN flange (HS 7307.19, carbon steel or stainless steel 304/316), forged flange (HS 7307.19, carbon steel ASTM A105 or stainless steel SS304), a generic flange covering carbon steel (ASTM A105), stainless steel 304/316/316L and alloy steel (HS 7307.19), and an anchor flange (HS 7307.91, carbon steel ASTM A105 or ASTM A350 LF2). In the broader industry, flanges of these materials are produced to ASME B16.5 and DIN 2573 standards, commonly in pressure classes 150, 300, 600, and 900 psi. Typical dimensions follow the DN (nominal diameter) range from 15 mm to 2000 mm, with thicknesses that match the pressure class. Stainless‑steel grades 304 and 316 are selected for corrosion‑resistant environments, while carbon‑steel ASTM A105 is favoured for general‑purpose pipelines.

Industry practice also includes surface treatments such as pickling, passivation for stainless steel, and galvanising for carbon steel to meet specific project specifications. Buyers often request mill test reports that confirm chemical composition, tensile strength, and hardness values aligned with the relevant ASTM or EN standards.

Trade and Export Information - Qingdao Wanfengyuan Piping Systerm Company Limited

China is a major exporter of flanges, and shipments classified under HS 7307.19 and 7307.91 are routinely directed to the oil‑and‑gas, petrochemical, shipbuilding, and construction sectors in regions including Southeast Asia, the Middle East, Europe, and North America. Importers typically require compliance with ISO 9001 quality management systems, and for pressure equipment, certifications such as PED (Pressure Equipment Directive) or CE marking are frequently requested. API 6A certification is common for flanges used in the oilfield, while EN 1092‑1 applies to European pipe fittings.

Standard export packaging consists of wooden crates or pallets with internal bracing to protect the flange faces, and container loading follows 20‑ft or 40‑ft container specifications. Incoterms most often used are FOB Qingdao or CIF destination port, allowing buyers to manage freight and insurance according to their logistics preferences.

Sourcing from Qingdao Wanfengyuan Piping Systerm Company Limited - Buyer Guidance

When sourcing flanges from this supplier, buyers should request the following documentation: a Mill Test Report (MTR) for each material grade, a compliance statement referencing ASME B16.5 or DIN 2573, and any applicable third‑party inspection certificates such as ISO 9001 or PED. Verifying the pressure class, nominal diameter, bolt circle dimensions, and face type (raised‑face, flat‑face, or ring‑type) against project specifications is essential before placing an order.

Samples of the flange face finish and material coupons are advisable for critical applications. Buyers should also confirm packaging details, container loading plans, and the chosen Incoterm to ensure smooth customs clearance, especially when HS codes 7307.19 or 7307.91 trigger specific import duties.

What flange materials are offered by Qingdao Wanfengyuan?

The supplier lists carbon steel (ASTM A105, ASTM A350 LF2), stainless steel grades SS304, SS316 and SS316L, and alloy steel variants across its five flange products.

Which HS codes apply to the flanges in the catalogue?

All flanges except the anchor flange are classified under HS code 7307.19, while the anchor flange is classified under HS code 7307.91.

Are standard industry specifications such as ASME B16.5 applicable?

Yes, the flange types correspond to common standards like ASME B16.5 for pressure classes and DN sizes, as well as DIN 2573 for European‑type flanges.

What certifications should a buyer request for these flanges?

Buyers typically request a Mill Test Report, ISO 9001 quality certification, and, where required, PED/CE or API 6A certificates to confirm compliance with pressure‑equipment regulations.

What is the typical minimum order quantity (MOQ) and lead time?

MOQ and lead time vary by flange size and material; buyers should confirm specific quantities and production schedules with the supplier during the quotation process.

How are the flanges packaged for export?

Flanges are usually packed in wooden crates or on pallets with internal bracing, suitable for 20‑ft or 40‑ft containers, and shipped under FOB Qingdao or CIF terms.

Which regions commonly import these Chinese flanges?

Major import destinations include Southeast Asia, the Middle East, Europe, and North America, especially for oil‑and‑gas, petrochemical, and infrastructure projects.

Can I request a sample before placing a full order?

Yes, the supplier can provide material coupons or a sample flange face finish for testing, subject to the buyer’s request and any applicable sample fees.