In-house manufacturing
Cutting, forging, heat treatment, machining and surface finishing are all completed in our own plant, so lead time and quality stay under our control rather than a subcontractor's.
Flange Manufacturing & Export
Flange Manufacturing & ExportReliable supply for industrial buyers worldwide
Hebei Guangzhu Pipe Fittings Manufacturing Co., Ltd. specialises in flange production, covering weld neck, slip-on, blind, socket weld, lap joint and large diameter custom flanges. We manufacture to ASME, EN, DIN, JIS and GOST standards and ship to customers worldwide.
- ASME / EN / DIN / JIS / GOST
- DN15 – DN5000
- Class 150 – 2500
- Quotation within 24 hours
2023Founded · years in business
30,000 m²Factory area (m²)
120+Production & technical team
40+Export markets
Why Guangzhu
Every critical process stays inside our own plant
Multi-standard production
Tooling and processes are ready for ASME B16.5/B16.47, EN 1092-1, DIN, JIS B2220, BS 4504 and GOST, so production can start as soon as you specify the standard.
Full-process quality control
Incoming material verification, spectro analysis, heat treatment records, full dimensional inspection and hydrostatic/seal testing are documented item by item, and material certificates are shipped with the goods.
Export packing & reliable delivery
Fumigated wooden cases and pallets, rust-preventive treatment, shipping marks and packing lists prepared to export requirements. We are experienced with FOB/CIF/DDP terms and letter of credit transactions.
Product range
Six flange families covering standard and large diameter requirements
Beyond the families below we also produce threaded flanges, hubbed slip-on flanges, spectacle blinds, stub ends and non-standard flanges from drawings.
WN
Weld Neck Flange
Hubbed weld neck / Taper hub
The weld neck flange is butt-welded to the pipe through its tapered hub, so th...
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SO
Slip-On Flange
Plate flange / Hubbed slip-on
The slip-on flange accepts the pipe through its bore and is fillet-welded on t...
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BL
Blind Flange
Flange cover / Blanking flange
The blind flange is a solid flange cover without a central bore...
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SW
Socket Weld Flange
SW flange
The socket weld flange has a bored recess that accepts the pipe, which is then...
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LJ
Lap Joint Flange
Loose flange with stub end
A lap joint flange is used together with a stub end...
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LD
Large Diameter Flange
Custom & heavy-duty flanges
Large diameter flanges serve oil and gas trunk lines, water conservancy projec...
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Production & testing capability
In-house forging, machining and heat treatment
- Medium-frequency induction heaters and forging equipment
- CNC vertical lathes for workpieces up to Φ1600 - Φ5000
- CNC lathes and machining centres for stable batch production
- Gantry milling machines, radial and multi-spindle drilling machines
- Heat treatment furnaces: normalizing, tempering, solution treatment
- Spectrometer and mechanical property testing equipment
- Shot blasting, sand blasting and coating lines
Large diameter flanges to ASME B16.47 Series A / B, or custom built to DN1500 - DN5000 from your drawings.
Export markets
Shipping to customers across the world
North America
USA · Canada · Mexico
South America
Brazil · Chile · Peru · Argentina
Europe
Germany · Italy · Spain · Poland · Netherlands
Middle East
UAE · Saudi Arabia · Oman · Qatar
Southeast Asia
Vietnam · Indonesia · Thailand · Malaysia
Africa
South Africa · Nigeria · Egypt · Kenya
Russia & CIS
Russia · Kazakhstan · Uzbekistan
Oceania
Australia · New Zealand
How we work
From inquiry to shipment in four steps
Inquiry & quotation
Send us the standard, size, pressure rating, material and quantity. We reply with pricing and technical clarifications within 24 hours.
Contract & material
Once drawings, standards and commercial terms are confirmed we sign the contract, release material by heat number and schedule production.
Production & inspection
Forging, heat treatment, machining and surface finishing run process by process, with photos or video feedback at the key stages.
Packing & shipment
Export wooden case packing, shipping marks, customs clearance and booking, with packing list, invoice and the full document set.
Frequently asked questions
The questions buyers ask us most
Which flange standards can you produce to?
We regularly produce to ASME/ANSI B16.5, B16.47 and B16.36, EN 1092-1, DIN 2573/2576/2632/2633, JIS B2220, BS 4504, GOST 12820/12821 and UNI 2277/2278. Just send us the standard, size, pressure rating, material and facing type for a quotation, or supply a drawing for a custom non-standard flange.
What is your minimum order quantity?
For standard sizes we normally start at one pallet or one case, typically 1 tonne or 100 pieces. Trial orders can be mixed across sizes to fill a container. Large diameter and custom flanges require dedicated material, so the minimum will be higher - please confirm with your quotation.
What is the usual lead time?
Stock sizes ship in 7-15 days. Standard products in large volumes take 20-30 days. Large diameter or custom items take 25-45 days depending on cutting and heat treatment scheduling. During peak season please place orders 2-3 weeks earlier.
What materials and inspection reports do you provide?
Carbon steel A105, A350 LF2, Q235 and 20#; stainless 304/304L, 316/316L and 321; alloy F1, F5, F9, F11, F22 and F91; duplex F51/F53/F55. Material certificates, chemical and mechanical property reports, heat treatment records and dimensional inspection reports are supplied with the goods, and third-party inspection by SGS, BV or TUV can be arranged.
Send us your specification - we reply within 24 hours
Just send the standard, size, pressure rating, material and quantity. Drawings are welcome - we will review feasibility and clarify the technical details.