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NXF UNS NO7718/2.4668/NiCr19NbMo/alloy 718 DN15-1200 Class150-1500 Nickel Alloy Forged Fitting Socket Welding Flanges
2026-09-22 21:02 NXF GROUP
2
Products Description
Alloy 718 Introduction.
Alloy 718/2.4668 is a nickel-chromium-iron alloy with niobium and molybdenum and low contained aluminum and tnum. Excellent mechanical properties in lower temperatures. Excellent corrosion resistance at high and low temperatures Inconel 718 is a nickel-based super alloy that is well suited for applications requiring high strength in temperature ranges from cryogenic up to 1400°F. Inconel 718 also exhibits excellent tensile and impact strength.
Socket Welding Flanges Introduction
1. Basic Definition & Structural Features：Socket welding flange is a common type of pipe flange designed for socket welding connection, consisting of a flat flange disc and a cylindrical socket hub. Unlike weld neck flanges, it has no extended tapered neck, and pipes are inserted into the pre-machined socket bore of the flange before welding. This compact structural design features simple geometry, smooth internal flow passage, and no protruding weld beads inside the pipeline, ensuring stable fluid transmission and neat installation appearance.
2. Core Performance Advantages：This flange type boasts multiple practical advantages for industrial piping systems. First, it requires no precise pipe end trimming and alignment compared to butt welding flanges, greatly reducing installation difficulty and construction time. Second, the socket structure provides dual fixation support for pipes, delivering excellent connection rigidity and anti-vibration performance. Third, the small and uniform welding seam effectively avoids welding defects such as incomplete penetration and porosity, ensuring high connection tightness and structural stability. Additionally, it causes minimal pressure loss to the fluid inside the pipe.
3. Applicable Working Conditions & Specifications：
Socket welding flanges are mainly applicable to small-diameter pipeline systems, typically for pipe sizes ranging from DN15 to DN80. They are suitable for medium and low pressure working environments, as well as low-temperature and non-shock service conditions in industrial systems. Standard pressure ratings include PN10, PN16, PN25 and PN40, complying with international standards such as ASME B16.5, GB/T 9117 and DIN. Common manufacturing materials cover carbon steel, stainless steel and alloy steel, adapting to different fluid media including water, oil, gas and conventional chemical fluids.
4. Standard Welding & Installation Requirements：Professional installation specifications must be followed to guarantee service performance. Before welding, pipes need to be cleaned of rust, oil and impurities to ensure a clean welding surface. A standard gap is reserved between the pipe end and the socket bottom to compensate for thermal expansion during welding and prevent structural deformation. Fillet welding is adopted for the outer joint of the socket, with full weld penetration and uniform weld formation required. After welding, non-destructive testing can be carried out according to working pressure standards to eliminate hidden dangers of leakage.
5. Main Application Fields：
Due to its reliable performance and cost-effectiveness, socket welding flanges are widely used in various industrial and civil piping systems. They are extensively applied in petrochemical engineering, power plants, water supply and drainage projects, heating and ventilation systems, as well as light industry and pharmaceutical industries. They are especially favored for small-bore pipeline connections that require high tightness, low vibration and convenient maintenance, becoming an indispensable fitting for standardized pipeline engineering construction.
Socket Welding Flanges Drawing
Alloy 718 Chemical composition and mechanical properties
Factory and Product Pictures
Socket Welding Flanges Factory and Product Pictures
Alloy 718 PMI spectral testing proves
Customer visit to the factory video
718 Socket Welding Flanges Produce Processing
1. Raw Material Inspection and Cutting：The whole production process starts with strict raw material verification. Qualified steel billets of carbon steel, stainless steel or alloy steel are selected and inspected for chemical composition, mechanical properties and surface quality to meet ASTM and ASME standard requirements. After inspection, the raw materials are precisely cut into fixed-size blanks according to flange specifications, with burrs and impurities removed to ensure a clean and uniform base for subsequent forging processing.
2. High-temperature Heating and Forging Forming：The cut steel blanks are sent to a professional heating furnace and heated to a standard temperature range of 1100°C to 1250°C based on material characteristics. The heated blanks are hot-forged by high-precision forging equipment to form the primary blank of socket welding flanges. This forging process optimizes the metal grain structure, eliminates internal porosity and defects, and greatly improves the structural strength, pressure resistance and fatigue resistance of the flange, ensuring overall structural compactness.
3. Professional Heat Treatment：To eliminate internal stress generated during forging and stabilize mechanical performance, all forged flange blanks undergo standardized heat treatment. Different processes including normalizing, annealing, quenching and tempering are adopted according to material grades and pressure level requirements. This procedure effectively improves the hardness, toughness and corrosion resistance of the product, avoids deformation and cracking in later use, and ensures the flanges meet industrial service stability standards.
4. Precision CNC Machining：
Heat-treated flange blanks are processed by high-precision CNC machine tools for fine machining. The processing covers key procedures such as socket inner hole finishing, flange face polishing, outer diameter shaping, and bolt hole drilling. Strict dimensional tolerance control is implemented in accordance with ASME B16.5 and industrial specifications to ensure the accuracy of socket depth, aperture and bolt position, guaranteeing perfect matching and assembly with supporting pipelines.
5. Strict Quality and Nondestructive Testing：After machining, comprehensive quality inspection is carried out on finished flanges. The inspection includes dimensional parameter verification, surface defect detection, flatness and roughness testing. Meanwhile, professional nondestructive testing (NDT) such as ultrasonic testing and magnetic particle testing is conducted to check for internal cracks, inclusions and hidden welding defects. Unqualified products are screened out to ensure all finished products meet pressure resistance and tightness requirements.
6. Marking, Surface Treatment and Packaging：Qualified flanges undergo standardized surface treatments including rust removal, pickling, passivation and anti-rust oil coating to enhance oxidation and corrosion resistance. Then, permanent marking is performed on the flange surface, including material grade, pressure rating, standard number, batch number and size parameters for product traceability. Finally, finished products are packed and sealed professionally to prevent damage and pollution during transportation and storage.
Our NXF GROUP advantage as follow
1.Our NXF GROUP have our own factory, and we can control the cost by producing by ourselves. We have a great advantage in price and can give you the lowest price based on best quality.
2.Our NXF GROUP can strictly control the quality. We have production,quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent qualitycertificate system and trademark certificate
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent qualitycertificate system and trademark certificate
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
Packing & Delivery
Packing
Delivery
Company Profile
New XiFei (SuZhou) Business Co.,Ltd is one of the leading and most respected manufacturers in China. Our products
includemetals,machinery, containers, construction materials, mechanical products, electrical systems, and medical
accessories.Establishedin1980, XIFEI has been working diligently ever since to embrace the needs of our global customer base.We work to ensure absolutecustomer satisfaction. Our team has dedicated itself to perfecting our three core components, "Service, Management andCraftsmanship." Our advantage:3S Service(Small Quantity/Short Time/Special Material).
includemetals,machinery, containers, construction materials, mechanical products, electrical systems, and medical
accessories.Establishedin1980, XIFEI has been working diligently ever since to embrace the needs of our global customer base.We work to ensure absolutecustomer satisfaction. Our team has dedicated itself to perfecting our three core components, "Service, Management andCraftsmanship." Our advantage:3S Service(Small Quantity/Short Time/Special Material).
Certification
FAQ
1. who are we?
We are based in Jiangsu, China, start from 2021,sell to South Asia(30.00%),South America(10.00%),Eastern Europe(10.00%),Mid East(10.00%),Eastern Asia(10.00%),Southeast Asia(5.00%),Africa(5.00%),Central America(5.00%),Northern Europe(5.00%),North America(5.00%),Domestic Market(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?
We are based in Jiangsu, China, start from 2021,sell to South Asia(30.00%),South America(10.00%),Eastern Europe(10.00%),Mid East(10.00%),Eastern Asia(10.00%),Southeast Asia(5.00%),Africa(5.00%),Central America(5.00%),Northern Europe(5.00%),North America(5.00%),Domestic Market(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?
1.Our NXF GROUP have our own factory, and we can control the cost by producing by ourselves. We have a great advantage in price and can give you the lowest price based on best quality.
2.Our NXF GROUP can strictly control the quality. We have production,quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent qualitycertificate system and trademark certificate
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by AlibabaInternational Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with aone-stop service.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA,DDP,DDU；
Accepted Payment Currency:USD,EUR,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A,Credit Card,PayPal;
Language Spoken:English,Chinese,Spanish,Russian
2.Our NXF GROUP can strictly control the quality. We have production,quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent qualitycertificate system and trademark certificate
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by AlibabaInternational Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with aone-stop service.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA,DDP,DDU；
Accepted Payment Currency:USD,EUR,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A,Credit Card,PayPal;
Language Spoken:English,Chinese,Spanish,Russian
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