Which standards do your pipe fittings and flanges comply with?

We manufacture to ASME B16.5, ASME B16.47, ASME B16.36, ASME B16.9, ASME B16.11, MSS SP-97, EN 1092-1, BS 10, DIN, JIS, ISO and API standards, with materials certified to the relevant ASTM / ASME specifications such as ASTM A182, A105, A234, A403, A350 and A420.

Do you supply mill test certificates with every order?

Yes. Every shipment is supplied with EN 10204 3.1 mill test certificates, and each piece is marked with its heat number so chemistry and mechanical properties can be traced back to the original melt. Third-party inspection by the buyer's nominated agency can be arranged on request.

Which materials do you keep in ready stock?

We hold ready stock in stainless steel (304, 304L, 316, 316L, 904L), duplex and super duplex, carbon steel (A105, A234 WPB, A350 LF2), alloy steel (F11, F22, WP11, WP22) and nickel alloys including Inconel, Hastelloy, Monel and Incoloy, as well as titanium grades.

Can you manufacture custom or non-standard piping components?

Yes. We produce custom-made piping connections to customer drawings, including sizes larger than 4 inch, special bores, non-standard pressure classes and open die forgings.

What fastener sizes and grades can you produce?

We produce high tensile bolts and nuts from M20 to M72 in metric and 3/4 inch to 3 inch in UNC, in property classes 8.8, 10.9 and 12.9, as well as ASTM A193 B6, B7, B8, B8M stud bolts and ASTM A194 2H heavy hex nuts.

Which countries do you export pipe fittings and flanges to?

Our main export markets include the UAE, Saudi Arabia, Qatar, Oman, Turkey, Egypt, Malaysia, Indonesia, the Philippines and Singapore, with sales representation in Poland, Italy, the UK, the USA and other countries.

Stainless Steel Weld Neck Flange ASME B16.5 Class 150/300/600 304/316L Forged Painted Corrosion Resistant Pipe Flange Fittings

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Stainless Steel Weld Neck Flange ASME B16.5 Class 150/300/600 304/316L Forged Painted Corrosion Resistant Pipe Flange Fittings

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Product Description

Guangzhou Dingtai Chang International Trade Co., Ltd. is a professional supplier of high-quality stainless steel pipe fittings, focusing on providing reliable industrial pipeline sealing solutions. Our stainless steel blind flanges are made of premium 304/316/316L stainless steel, with excellent corrosion resistance, high temperature resistance and pressure resistance, widely used in oil, gas, chemical, water treatment, construction and other industrial pipeline systems.

Products Description

Basic Parameters of the Steel Flange
Material	Stainless Steel Flange, Carbon Steel Flange
Standard	ANSI, ASME, DIN, BS, JIS, GB, ISO, etc.
Type	Welding Neck Flange, Slip On Flange, Blind Flange, Lap Joint Flange, Socket Welding Flange, Threaded Flange, Flat Flange, Long Welding Neck Flange, etc.
Surface Treatment	Apply anti-rust oil, Epoxy-coated, Hot-dipped galvanized, Electrical galvanized, Yellow lacquer
Heat Treatment	Carbon steel	Normalizing
	Stainless steel	Treatment with solid solving
	Alloy steel	Normalizing + Tempering, Quenching
Connection	Welding, Threaded
Package	1: Standard export packaging (Plywood case outside, plastic cloth inside). 2: As customers' requirements.
Application Areas	Machine Building, Pressure vessel, Water works, Shipbuilding industry, Petrochemical & Gas industry, Power industry, and general pipe connecting projects, etc.

Application Scenarios

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Oil & Gas Industry

Pipeline sealing of oil wells, refineries, and natural gas transmission systems.

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Chemical Industry

Reliable sealing of corrosive medium pipelines in chemical processing plants.

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Water Treatment

Water supply, industrial drainage, and municipal sewage treatment pipeline systems.

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Construction & HVAC

Building fire protection installations, central heating, and ventilation pipelines.

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Food & Beverage

Hygienic and sanitary pipeline sealing within high-standard food processing plants.

Certifications

Company Profile

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10+ Years Experience

Over a decade of stainless steel pipe fittings export experience, serving Europe, America, Southeast Asia, Middle East, and beyond.

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Professional Technical Team

Dedicated engineering staff providing comprehensive technical consultation and tailored solution design.

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Flexible MOQ

Supporting small-batch trial orders with welcoming terms for sample evaluations.

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24/7 Dedicated Support

Continuous online service ensuring rapid response to all inquiries and after-sales support demands.

Packing & Shipping

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IPPC Wooden Cases & Anti-Rust Treatment

Eco-friendly packaging protecting products from scratches, rust, and transit impacts during long voyages.

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Flexible Shipping Options

Support for Sea, Air, and Express freight under FOB, CIF, and DDP terms with complete door-to-door capability.

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Fast & Reliable Lead Times

Stocked items ready to ship in 3-7 days; custom configurations manufactured and delivered promptly.

Frequently Asked Questions

Q1 Can you provide custom size and standard?

Yes, we support full customization of size, standard, material and surface treatment. Please send us your technical drawings or specific requirements.

Q2 What is your Minimum Order Quantity (MOQ)?

For standard inventory sizes, our MOQ is 1 piece; for customized sizes and designs, the MOQ is 50 pieces. We also support initial sample orders.

Q3 Can you provide free samples?

Yes, we can provide free product samples for quality evaluation; you only need to cover the associated shipping freight costs.

Q4 What payment terms do you support?

We accept multiple flexible payment options including T/T, L/C, Western Union, PayPal, and others upon consultation.

Q5 How do you guarantee product quality?

All products maintain strict quality traceability. We provide authoritative third-party inspection reports (such as SGS, BV) when requested and fully welcome on-site inspections.

Q6 What surface treatments are available for your flanges?

We offer diverse anti-corrosion surface treatments, including anti-rust oil, epoxy coating, hot-dipped galvanizing, electrical galvanizing, and protective yellow lacquer.

Stainless Steel Weld Neck Flange ASME B16.5 Class 150/300/600 304/316L Forged Painted Corrosion Resistant Pipe Flange Fittings

Product Description

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