Socket Weld Flange SW
SW socket weld flanges are specially designed for small and medium diameter high-pressure pipeline systems, mainly used for pipeline port connections, pipeline branching, and equipment interface docking, achieving detachable sealed connections for pipelines. The product is fixed by fillet welding on the outer side of the socket after the pipe is inserted into the socket, and its sealing stability is superior to threaded flanges, with no risk of leakage caused by thread loosening, making it suitable for high-temperature, high-pressure, and slight-vibration pipeline working conditions. It is mainly used for process pipelines, instrument pipelines, valve connections, pump inlet and outlet ports, and small high-pressure pipeline connections, replacing some threaded flanges and small butt weld flanges. It is suitable for pipeline systems that require frequent inspection, disassembly, and maintenance, solving the connection difficulties of small-diameter high-pressure pipelines, effectively improving pipeline sealing performance, stability, and service life, eliminating hidden dangers of high-pressure medium leakage, and is the first choice for fine chemicals and high-pressure small pipelines.
Inquiry
- This SW socket weld flange is integrally forged
- High density, high strength, stable pressure resistance and temperature resistance performance
- No sand holes or air pores, no deformation or cracks
- Mechanical properties far exceed those of flanges machined from plates. The socket-type structure is convenient to install
- No pipe beveling required
Detailed Introduction
Socket weld flange (SW) is a forged small-diameter high-pressure flange. The pipe is inserted into the socket of the flange and then fillet welded on the outside. Sealing is achieved by bolts and gaskets. The mainstream applicable diameters are DN15-DN80 (NPS 1/2″-3″), and it complies with standards such as ASME B16.5, GB/T9119, HG/T20592, etc. Compared with threaded flanges, there is no risk of thread leakage; compared with butt weld flanges, no groove is required, making installation faster. The product is widely used in high-pressure small pipelines in chemical, oil and gas, power plants, water treatment, etc., and is suitable for high-temperature, high-pressure, and vibration working conditions. Guojie provides materials such as carbon steel and stainless steel, supports non-standard customization, and welcomes the provision of dimensions and pressure ratings so that we can assist with selection.
- Integral forging process, high density, high strength, no sand holes or air pores, stable pressure resistance and temperature resistance performance
- Socket-type structure, no pipe grooving required, convenient on-site installation, reducing construction difficulty
- Fillet weld has strong sealing performance, eliminates high-pressure leakage, and is superior to threaded flanges
- Suitable for DN15-DN80 small diameters, pressure ratings Class150-2500LB, PN16-PN160
- Supports non-standard customization, including special diameters, materials, sealing faces, and coating treatments
- Stocked items are regularly available, supporting orders from 1 piece, meeting sample testing and urgent order needs
| Product Name | Socket Weld Flange SW |
| Product Category | Contact us to confirm |
| Product Standard | ASME B16.5, GB/T9119, HG/T20592; nominal diameter: DN15-DN80 (NPS1/2″-3″); pressure rating: Class150-2500LB, PN16-PN160; sealing face: RF, FF, MFM, TG, RJ; connection method: socket welding, bolt fastening; process: integral forging, heat treatment, non-destructive testing; wall thickness and flange thickness strictly follow standard tolerances, and bolt hole positions are precise and symmetrical. Working temperature: carbon steel -20℃~425℃, stainless steel -196℃~600℃; suitable media: water, oil and gas, steam, chemical fluids. All parameters can be strictly matched to American standards, national standards, and European standards, and complete |
| Customization | Our factory possesses full-dimensional non-standard customization capabilities, and can customize special diameters, non-standard wall thicknesses, special socket depths, unconventional bolt hole spacing, and special-shaped hole-position SW flanges. We support customization of special pressure ratings, special sealing surface machining, high-temperature corrosion-resistant special treatment, sandblasting and rust removal, hot-dip galvanizing, and epoxy anti-corrosion coatings. We can reverse-customize various non-standard socket weld flanges according to customer drawings, samples, and engineering parameters. We support laser marking, engraved LOGO, OEM/ODM production, and customized packaging. We can customize products in special materials such as alloy steel, duplex steel, and super stainless steel, adapting to the customization needs of high-end chemical industry, overseas high-end engineering, and special equipment; after drawing confirmation, we can quickly produce samples and land batch production. |
| MOQ | This product supports a flexible minimum order model. The minimum order quantity MOQ for standard in-stock items is 1 piece, which can meet the needs of sample testing, small-order replenishment, equipment maintenance, and trial procurement. Conventional Chinese standard and American standard carbon steel and stainless steel common specifications (DN20-DN50, Class150/300) support loose picking and mixed-batch picking, with no high minimum order threshold. Bulk procurement has no |
| Lead Time | Conventional in-stock specifications (carbon steel A105, 20#, stainless steel 304/316 conventional diameter and pressure) are shipped on the same day or within 24 hours, meeting customers' urgent order and replenishment needs. The delivery time for standard conventional orders in bulk is 3-7 working days, and the delivery time for conventional non-standard size changes, hole changes, and sealing surface changes is 7-10 working days. Special materials, high-pressure ratings, extra-large pressure, special heat |
| Packaging | Our factory's SW socket weld flanges adopt foreign-trade standardized multi-layer protective packaging to eliminate transportation collisions, rust, and scratches. The sealing surface of each flange is covered with a scratch-resistant protective film, and the bolt holes are plugged to prevent dust and rust; small parts are uniformly wrapped independently in waterproof bubble wrap to avoid friction damage. Batch products are packed in categorized boxes, with standard packaging using solid wood fumigated pallets or export cartons, and large items reinforced and secured with packing straps. All packaging is moisture-proof, rust-proof, and shock-proof, suitable for long-distance sea, land, and air transportation. The outer carton is marked with product model, specifications, material, standard, quantity, batch, and shipping mark information, clearly traceable. We support customer-customized neutral packaging, OEM packaging, and exclusive shipping mark packaging, fully complying with foreign trade export commodity inspection, customs clearance, and overseas warehousing standards. |
| Reference Price | Inquiry |
Applications
- Chemical plant high-pressure process pipeline connections, used for interface docking of valves, pump bodies, and instrument pipelines
- Power plant boiler auxiliary pipelines, small-diameter high-pressure pipelines in steam-water systems
- Instrument and sampling lines in oil and gas transmission
- High-pressure chemical dosing lines in water treatment
- Installation environments with limited space where pipeline connections cannot be made by bevel butt welding
Overview
Socket weld flange (SW) is a forged small-diameter high-pressure flange. After the pipe is inserted into the flange socket, it is fixed by fillet welding on the outside, and sealing is achieved by bolts and gaskets. The mainstream applicable diameters are DN15-DN80 (NPS 1/2″-3″), and it implements standards such as ASME B16.5, GB/T9119, and HG/T20592. Compared with threaded flanges, there is no risk of thread leakage; compared with butt weld flanges, no beveling is required, and installation is faster. The product is widely used in high-pressure small pipelines in chemical, oil and gas, power plant, and water treatment industries, and is suitable for high-temperature, high-pressure, and vibration working conditions.
Key Features
This SW socket weld flange adopts an integral forging process, featuring high density, high strength, no sand holes or gas pores, and stable mechanical properties. The socket-type structure is easy to install and requires no pipe beveling, greatly reducing on-site construction difficulty and labor costs. The fillet weld provides strong sealing performance, eliminating high-pressure leakage. Applicable sizes are DN15-DN80, and pressure ratings cover Class150-2500LB, meeting various high-pressure working conditions. Non-standard customization is supported, including special materials, sealing surfaces, and coatings, adapting to high-end engineering needs.
Applications
SW socket weld flanges are mainly used for small-diameter, medium-to-high pressure, and high-temperature working conditions, and are widely used in petrochemicals, natural gas transportation, thermal power generation, nuclear power auxiliary pipelines, and water treatment and environmental protection engineering. They are suitable for industrial high-pressure instrument pipelines, hydraulic and pneumatic equipment pipelines, fine chemical process pipelines, pharmaceutical clean pipelines, boiler supporting pipelines, and fire-fighting high-pressure pipeline systems. They are especially suitable for installation environments with limited space where butt welding with beveling is impossible. They are not suitable for large-diameter, highly corrosive, or high-frequency severe vibration main pipelines.
Specifications
Executive standards: ASME B16.5, GB/T9119, HG/T20592. Nominal diameter: DN15-DN80 (NPS 1/2″-3″). Pressure rating: Class150-2500LB, PN16-PN160. Sealing surface: RF, FF, MFM, TG, RJ. Connection method: socket welding, bolt fastening. Process: integral forging, heat treatment, non-destructive testing. Wall thickness and flange thickness strictly follow standard tolerances, and bolt hole positions are precise and symmetrical. Working temperature: carbon steel -20℃~425℃, stainless steel -196℃~600℃. Suitable media: water, oil and gas, steam, chemical fluids. All parameters can be matched to American standards, national standards, and European standards, and complete dimensional data can be provided.
Purchase & Delivery
This product supports flexible minimum order quantities. The minimum order quantity for standard in-stock items is 1 piece, meeting the needs of sample testing and small-order replenishment. Regular specifications support mixed-batch ordering. Regular in-stock specifications are shipped the same day or within 24 hours, standard order delivery time is 3-7 working days, and non-standard customized delivery time is 7-10 working days. Packaging uses standardized multi-layer protection for foreign trade, and customized neutral packaging and private-label packaging are supported. Bulk procurement has no high minimum order threshold. You are welcome to contact us to confirm specific delivery time and packaging requirements.
Service & Support
We provide comprehensive foreign-trade-grade after-sales service, and all products undergo strict quality inspection before leaving the factory. If there are quality problems, dimensional deviations, or wrong specifications shipped upon receipt, we provide free returns and exchanges, reshipment, and remanufacturing, and bear the corresponding logistics losses. We provide full-process technical selection support and free parameter tables, dimensional drawings, selection solutions, and installation suggestions. For long-term orders, we provide inventory consignment management, partial shipment, and on-demand replenishment services. The product warranty period is long, and under normal working conditions, non-human-caused damage is covered by warranty protection. We provide lifetime product consultation, after-sales follow-up, and technical Q&A, and support customer repeat purchase price adjustments and long-term strategic cooperation prices.
FAQ
What is the difference between SW flanges and SO and WN flanges?
SW (socket weld) flanges are suitable for small pipe high pressure within DN80, with fast installation and no beveling required; WN (welding neck) flanges are suitable for large-diameter high-pressure main pipelines; SO (slip-on) flanges are suitable for low-pressure ordinary pipelines.
Can it be exported to Europe and America?
Yes. We implement American standards such as ASME B16.5, are fully qualified, and can clear customs normally. For specific certification documents, please contact us to confirm.
Do you support sample procurement?
Yes. The minimum order quantity for in-stock standard models is 1 piece, which can meet sample testing needs. Sample shipping costs are negotiable.
Can mixed-batch procurement be done?
Yes. Regular specifications support mixed-batch shipment of multiple specifications and multiple materials, making it convenient for you to stock flexibly.
Are certificates included with delivery?
By default, a full set of material and quality inspection reports is included, and it can be upgraded to a 3.2 certificate as needed. For specific certificate types, please contact us to confirm.
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