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NXF UNS N04400/Monel400/NiCu30Fe/Alloy 400/NCu30 DN15-1200 Class150-1500 Nickel Alloy Forged Socket Welding SW Flange

2026-01-05 17:49 NXF-GROUP
19
Monel400 Introduction
Monel 400 alloy (UNS N04400/MCu-28-1.5-1.8/Ni68Cu28Fe) is a nickel-based alloy, primarily composed of nickel-copper alloy, with a melting point of 1300-1350°C. It exhibits good corrosion resistance in corrosive media such as seawater, hydrofluoric acid, and sulfuric acid. This alloy demonstrates stable mechanical properties and is suitable for working environments ranging from low to high temperatures. Welding can be performed using TIG, MIG, and manual arc welding, matched with Monel body material or EniCu-7 welding consumables. This alloy is mainly used in the manufacture of heat exchange equipment, chemical pipelines, reaction vessels, and other devices, conforming to standards including ASTM B 164 (bars) and ASTM B 127 (plates). During machining,shrinkage allowance must be allowed to ensure dimensional accuracy. This can be achieved through traditional machining methods; however, high-speed machining requires the use of water coolant.
Socket welding flange Introduction
Socket welding flange refers to the flange that the pipe end is inserted into the flange ring step and welded at the pipe end and the outside. There are two types: with neck and without neck. The neck pipe flange has good rigidity, small welding deformation, good sealing, and can be used in occasions with a pressure of 1.0~10.0MPa. The type B flange for containers is also a socket welding flange, which is used in occasions with high sealing requirements. When designing, the socket welding flange can be checked as an integral flange.
  Socket Welding Flange Drawing
Monel400 of Chemical composition and mechanical properties
Socket Welding Flange Actual Product Image
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Specification

Product name
Socket Welding Flange
Material
Monel 400
Size
DN15-DN1200
Pressure
Class150-1500
Standard
ANSI JIS DIN ASME
MOQ
1 Piece
Connection method
Socket Welding
Application
Industry
Packing
Woonden box
Brand
NXF
Socket Welding Flange Produce Processing
1. Raw Material Selection & Blanking
- Select qualified carbon steel/stainless steel forgings (e.g.A105,304,316) compliant with flange standards; conduct chemical composition and mechanical property testing.
- Cut forgings into fixed-weight blanks by CNC sawing machine, ensure blank size accuracy and no surface defects.

2. Hot Forging Forming
- Heat blanks to optimal forging temperature in heating furnace, avoid overheating to prevent material grain coarsening.
- Forge blanks into socket weld flange rough shape by hydraulic press, ensure socket cavity preliminary forming and dense structure without cracks.

3. Rough Machining
- Fix forged blank on CNC lathe, rough machine outer circle, end face and socket cavity to remove excess allowance.
- Rough turn sealing face and welding socket, form basic flange structure matching drawing outline.

4. Heat Treatment
- Perform stress relief annealing on rough-machined flange to eliminate forging and machining internal stress, avoid deformation.
- Solution treatment and passivation for stainless steel flanges to enhance corrosion resistance and mechanical properties.

5. Finish Machining
- Precision machine socket inner wall, ensure socket size matches branch pipe outer diameter for tight fit.
- Finish machine sealing face, outer circle, end face and bolt hole positions via CNC machine, ensure dimensional tolerance ≤±0.02mm.
- Machine welding groove at socket end to meet standard weld size requirements.

6. Bolt Hole Drilling & Chamfering
- Position flange on CNC drilling machine,
drill bolt holes evenly in accordance with flange standards (ANSI, DIN, GB).
- Chamfer bolt hole edges and socket port to remove burrs, prevent sharp edges from damaging gaskets and pipes.

7. Surface Treatment
- Carbon steel flanges: Adopt galvanizing, painting or anti-rust oil coating to prevent corrosion during storage and use.
- Stainless steel flanges: Conduct pickling and passivation to remove surface oxide layer, improve surface finish and corrosion resistance.

8. Quality Inspection
- Dimensional inspection: Use CMM, calipers and micrometers to verify socket size, bolt hole position, sealing face flatness.
- Surface inspection: Eliminate products with scratches, pits, cracks; check socket fit accuracy and welding groove quality. - Material verification: Re-inspect chemical composition of sampled products to ensure compliance with standards.

9. Marking & Packaging
- Mark flange model, material, pressure rating, standard number and batch number by laser engraving or stamping.
- Wrap qualified flanges with anti-rust paper, pack in wooden cases to avoid collision damage; store in dry ventilated warehouse.

Packing & Delivery
Shipping
Company Profile
New XiFei (SuZhou) Business Co.,Ltd is one of the leading and most respected manufacturers in China. Our products include metals,machinery, containers, construction materials, mechanical products, electrical systems, and medical accessories.Established in1980, XIFEI has been working diligently ever since to embrace the needs of our global customer base.We work to ensure absolute customer satisfaction. Our team has dedicated itself to perfecting our three core components, "Service, Management and Craftsmanship."
Our advantage:3S Service(Small Quantity/Short Time/Special Material)
Application Areas
FAQ

1. who are we?
We are based in Jiangsu, China, start from 2021,sell to South Asia(30.00%),Eastern Asia(10.00%),Mid East(10.00%),Eastern
Europe(10.00%),South America(10.00%),Domestic Market(5.00%),North America(5.00%),Northern Europe(5.00%),Central
America(5.00%),Africa(5.00%),Southeast Asia(5.00%). There are total about 101-200 people in our office.

2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.what can you buy from us?
Pipe,Flange,Steel plate,Pipe fittings,Alloy products

4. why should you buy from us not from other suppliers?
Our advantage:3S Service (Small Quantity/Short Time/Special Material) We have our own factories, quality can be controlled
seriously. We Specialize in manufacturing about 21 years. We have professional testing department and testing equipment.

5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA；
Accepted Payment Currency:USD,EUR,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A;
Language Spoken:English,Chinese
6. Are you trading company or manufacturer ?
We are manufacturer.

7. How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to
quantity.

8. Do you provide samples ? is it free or extra ?
Yes, we could offer the sample for free charge but need pay the cost of freight.

9. What is your terms of payment ?
Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.

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