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Socket-weld flange
Category:
We have obtained TÜV product certification and ISO 9001 quality management system certification, and has invested in state-of-the-art instrumentation and equipment specific to the industry, ensuring more scientific, standardized, and modern manufacturing processes.
Product Details
Socket-weld flanges—small bore, high pressure, single-sided fillet weld
Socket-weld flanges (SW flanges) provide a smooth, high-strength connection without the need for threaded joints or full-penetration welds. The pipe is inserted into the socket until it abuts the shoulder, then backed out by 1/16 inch to accommodate thermal expansion, after which a fillet weld is applied on the outside. The static strength of SW flanges is comparable to that of other types, while their fatigue life is improved by approximately 50%, making them particularly suitable for piping systems subject to frequent pressure or temperature fluctuations.
Size concerns of buyers:
|
Nominal size |
½ inch – 4 inches (DN 15 – DN 100) |
|
Pressure rating |
150–2,500 pounds (PN 10–PN 400) |
|
Sealing surface |
RF, MFM, RJ |
|
Materials |
A105, LF2, F304, F316, F51 duplex stainless steel, and others. |
|
Weight |
0.5 kg – 1800 kg |
Characteristics of Socket-Weld Flanges
Single-bevel weld—no internal weld seams to prevent fluid blockage or crevice corrosion.
Smooth inner diameter—The pipe’s inner diameter is matched to the flange bore to minimize fluid flow resistance.
Compact manifolds—ideal for space-constrained pipe racks, dense piping layouts, and skid-mounted modules.
High Rigidity: Socket-weld flanges exhibit exceptional rigidity, capable of withstanding the pressure and temperature variations specified in ASME B16.5.
Typical Applications
High-pressure steam tracing pipe
Hydraulic and Lubricating Oil Piping
Chemical Injection Pipeline
Sampling points on the main pipeline
Fire Protection Piping Network
Quotation Guide
1: Provide dimensions, thickness, material, quantity, and standards.
2: Specify the machining allowance
3: Overview of Technical Requirements
4: Quote provided within 48 hours
5: Custom manufacturing services are available based on drawings.
Shanxi Chengyu Forging Co., Ltd.
Integrated forging manufacturer specializing in flanges and forgings across carbon steel, stainless steel, and alloy steel — serving the global petroleum, chemical, wind power, and marine industries.
Company Profile
A premier forging enterprise with integrated, end-to-end production capabilities — from raw material sawing through to finished product packaging and shipment.
Integrated Production
State-of-the-art instrumentation and equipment ensure scientific, standardized, and modern manufacturing processes across every stage.
Precision raw material cutting and blank preparation
Ring rolling, open-die and closed-die forging processes
Normalizing, quenching, tempering, and solution treatment
CNC turning, milling, and drilling to precise tolerances
Full physicochemical analysis and dimensional inspection
Export-grade packaging and logistics coordination
Product Portfolio
A comprehensive range of flanges and forgings manufactured to international standards, with particular expertise in necked slip-on and necked socket-weld flanges.
- Ring forgings
- Flanges (including necked slip-on and necked socket-weld types)
- Flange covers
- Shafts
- Tube sheets
Specialty focus: extensive manufacturing capabilities and proven experience in producing necked slip-on and necked socket-weld flanges — a key competitive differentiator.
Material Grades
Conforming Standards
Quality & Certifications
Internationally recognized certifications underpin every product we deliver, ensuring consistent quality and global market acceptance.
TÜV Product Certification
Independent third-party verification of product quality and conformity
ISO 9001 Quality Management
Systematic quality management across all production processes
| Item | Details |
|---|---|
| Enterprise Rating | AAA+ |
| Certifications | TÜV Product Certification, ISO 9001 |
| Annual Capacity | 8,000 metric tons |
| Annual Revenue | RMB 100 million |
| Personnel | 125 employees |
Served Industries
Our products are trusted across critical infrastructure and heavy industry sectors worldwide.
Petroleum
Chemical
Wind Power
Pressure Vessels
Shipbuilding
Machinery Mfg.
Keywords:
Chengyu
Forging
Online Quotation
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Jiulongwan Industrial Zone, Shacun Village, Dingxiang County, Xinzhou City, Shanxi Province
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