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My company has buy, examine, saw to slice, forge from the material, hot processing, the machine process packing hair luck the integral whole turn of production system.
Product Application
Petrochemical industry, energy industry, water treatment industry, environmental protection engineering, construction engineering, shipbuilding industry, valves, water pumps, power plants, steel mills: valves, water pumps, power plants, steel mills.
Quality Control
Company strictly according to ISO9000 standard organize produce and manage, build up valid circulate stable dependable quality management and guarantee system, strict material production equipments and quality of the control, consummate processing technology experience and forerunner examination experiment.
Superior Strength: Weld neck flanges are incredibly strong due to their welded neck design, making them ideal for high-pressure and high-temperature applications. They are often required selections over threaded or slip on styles due to their superior integrity.
Leak Resistance: Their precision welding ensures a tight seal, minimizing the risk of leaks and providing enhanced safety.
Reduced Stress Concentration: The smooth transition from the flange to the pipe reduces stress concentration, preventing cracks and failures.
Alignment Accuracy: Weld neck flanges facilitate precise alignment of pipes, resulting in better flow and reduced turbulence.
Enhanced Durability: Given their size/shape, these flanges typically have a longer lifespan due to their resistance to wear, corrosion, and erosion.
Reduced Maintenance: With fewer chances of leaks and failures, maintenance costs are lower than other flange types.
Improved Flow Characteristics: The smooth bore of weld neck flanges reduces pressure drop and turbulence, enhancing fluid flow.
Easy to Align, Install, and Test: Weld neck flanges can easily align to the pipe network in which it gets installed, resulting in a more robust weld. Also, the flange design makes it very accessible when inspecting the integrity of the weld via radiography testing.
Smooth Flow of the Liquid: Weld neck flanges match the pipe's internal diameter, allowing a smooth, high-pressure liquid flow. Also, the design assures that there is little “turbulence” within the pipe, a common reason for erosion, leading to robust, more durable pressure vessel connections.
Strong and Reliable: Weld neck flanges increase the pipe thickness from the weld all the way to the face of the flange. This design assures that the internally built stress by the flow of high-pressure liquid transfers to the pipe; it decreases the pressure on the flange itself.
Oil and gas energy
Wellhead equipment, compressor outlet pipeline, fractionating tower reducer interface
01
Chemical process
Reactor inlet and outlet, pump and valve reducer connection, high-pressure raw material conveying pipeline
02
Electric power project
Main steam pipe diameter change, high-pressure interface of feedwater system
03
Ocean engineering
FPSO deck piping, subsea pipeline onshore section
04
Special equipment
High-pressure heat exchangers, hydrogenation reactors, supercritical fluid systems
05
Stainless Steel Weld Neck Flanges :
ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L
Duplex & Super Duplex Steel Weld Neck Flanges :
ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61
Carbon Steel Weld Neck Flanges :
ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F706
Low Temperature Carbon Steel Weld Neck Flanges :
ASTM A350, LF2, LF3
Alloy Steel Weld Neck Flanges :
ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91
Copper Alloy Steel Weld Neck Flanges :
ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200
Weld Neck Flange Dimensions
Various sizes of Class 150 ASME B16.5 weld neck flanges are available, ranging from 1/2″ to 24″. Each size has a different outside and inside diameter, raised face thickness, and several bolt holes. The smallest size has an outer diameter of 3.50″ and four bolt holes, while the largest has an outer diameter of 32.00″ and a raised face thickness of 5.69″.
Material Selection: Based on application needs, high-grade raw materials like stainless steel, carbon steel, or nickel alloys are chosen.
Forging: The selected material is forged into the desired shape, ensuring strength and durability.
Machining: The flange is machined to achieve precise dimensions, including bolt holes and face finishes.
Heat Treatment: To enhance mechanical properties, the flanges undergo heat treatment processes such as annealing or normalizing.
Inspection and Testing:
Finishing: The flange is polished and coated (if required) to prevent corrosion and ensure a smooth surface finish.
Standards for Weld Neck Flanges
ASTM A105 for carbon steel weld neck flanges
ASTM A182 for alloy and stainless steel weld neck flanges, with variations for different grades
ASME B16.5 for flange dimensions and specifications
ASME B16.47 for large diameter flanges
BS 3293 for British standards
DIN 2630 PN standards for European applications
Marking & Packing
Products are packaged to ensure that there is no damage during transit. In case of exports, standard export packaging is done in wooden cases. All flanges are marked with Grade, Lot No, Size, Degree and our trade mark. On special requests we can also, make custom marking on our products.
We're professional weld neck flange manufacturers and suppliers in China, specialized in providing high quality customized products. We warmly welcome you to wholesale bulk weld neck flange for sale here from our factory.
Stainless Steel Weld Flanges, Carbon Steel Weld Neck Flange, Stainless Steel Weld Neck Flange(0/10)
