Flanges

1. Raw Material Preparation: 

Selection of high-quality forged steel (carbon/stainless/alloy/duplex/nickel alloy) based on application requirements.

2. Forging: 

Hot forging to shape the steel into flange blanks, ensuring structural integrity and uniform grain structure.

3. Machining: 

Precision machining of sealing surfaces (RF/FF/RTJ), bolt holes, and connection ends to meet ANSI/ASME standards for leak-proof fits.

4. Heat Treatment: 

Annealing, quenching, or tempering to enhance material strength, toughness, and corrosion resistance—critical for alloy and duplex steel variants.

5. Surface Treatment:

Carbon Steel: Painting, galvanizing, or anti-corrosion coating to withstand harsh outdoor/industrial environments.

Stainless Steel/Duplex Steel: Pickling and passivation to preserve corrosion resistance.

6. Quality Inspection: 

Dimensional checks, pressure testing, non-destructive testing (NDT), and material composition analysis to verify compliance.

7. Packaging: 

Preparation for global shipping with protective materials to prevent damage.

Leak-Proof Sealing: 

Precision-machined sealing surfaces (RF/FF/RTJ) ensure tight connections even under high pressure/temperature.

High Pressure & Temperature Resistance: 

Withstands up to 2500 PSI and extreme temperatures (-200°C to +1000°C) with suitable materials.

Corrosion Resistance: 

Stainless steel/duplex/nickel alloy variants resist humidity, salt spray, and chemical erosion; coated carbon steel adapts to harsh conditions.

Durability & Stability: 

Forged construction resists mechanical stress, vibration, and erosion in demanding industrial settings.

Easy Maintenance: 

Enables quick disassembly for inspection, repair, or modifications without disrupting the entire piping system.

Climate Adaptability: 

Performs reliably in desert heat, tropical humidity, and extreme industrial temperature fluctuations.

Versatile Compatibility: 

Multiple types (Welding Neck/Slip On/etc.) and connection methods suit diverse project needs.

Our Pipe Flanges comply with international and regional standards for global project approval:

• International Standards: ANSI/ASME B16.5, ANSI/ASME B16.47, API, DIN, EN, JIS, ISO
• Material Standards: ASTM A105 (carbon steel), ASTM A182 (stainless/alloy/duplex steel)
• Quality Certifications: ISO 9001, SGS, Material Test Certificates (MTC)
• Regional Compliance: SASO (Middle East), SONCAP (Africa), SNI (Indonesia), TIS (Thailand), BIS (India)
• All orders include compliance documents and test reports for smooth customs clearance.

Packaging

• Flanges are wrapped in waterproof film and packed in wooden crates with foam padding to prevent scratches, deformation, and rust during transit.
• Bulk orders are secured with steel straps on ISPM 15-certified wooden pallets for stability.
• Clear English labeling includes flange type, size, pressure class, material grade, and batch number for easy identification.

Shipping

• Lead Time: Standard orders (≤500 units): 15-25 working days; Bulk orders (＞500 units): 25-35 working days; Custom configurations: 20-30 working days.
• Logistics Partners: Maersk, CMA CGM, Aramex, and regional carriers for inland delivery to manufacturing/construction sites.
• Delivery Coverage: Port-to-port, door-to-door for major cities, and tailored solutions for remote project locations.
• Global Reach: Supply to all regions except Europe and the US, with optimized shipping routes for each market.

RFQ Question: Do your stainless steel flanges resist coastal salt spray for chemical systems? 

Answer: Yes, our ASTM A182 F316 stainless steel flanges offer superior saltwater corrosion resistance, ideal for coastal chemical systems.

RFQ Question: Need welding neck flanges for power plant steam lines—can they withstand high temperatures?

Answer: Our ASTM A182 F22 alloy steel welding neck flanges withstand extreme temperatures (+1000°C) and high pressure (Class 1500).

RFQ Question: Can you supply custom-size duplex steel flanges for offshore use?

Answer: Yes, we offer custom-size ASTM A182 F53 super duplex flanges designed for offshore harsh conditions. They provide superior corrosion resistance and guaranteed for standard custom orders with MTC.

RFQ Question: What’s the warranty for carbon steel flanges used in water treatment? 

Answer: Our ASTM A105 carbon steel flanges come with a 3-year warranty against manufacturing defects.

RFQ Question: Are your blind flanges compatible with high-pressure oil&gas pipelines?

Answer: Yes, our Class 600 blind flanges (carbon/duplex steel) are rated for high-pressure oil&gas use.