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Create robust, permanent hydraulic and process lines with our precision DIN 2353 Stainless Steel Weld Fittings. Engineered to the exact specifications of the DIN 2353 and ISO 8434-1 standards, these fittings are designed for direct, tube-to-tube welded connections where maximum system integrity, leak prevention, and clean fluid flow are critical. Unlike compression fittings, the welded joint eliminates potential leakage points, offering superior performance in extreme pressure, high-vibration, and high-temperature applications. Fabricated from corrosion-resistant AISI 316/316L stainless steel, they ensure long-term reliability in demanding environments such as chemical processing, offshore platforms, pharmaceutical plants, and high-purity systems.
Permanent, Zero-Leak Connection: The welded joint creates a homogeneous, leak-proof connection that is integral to the tubing, eliminating the potential for seal failure common in threaded or compression fittings under extreme conditions.
Maximum Pressure & Temperature Resistance: With no seals or moving parts, welded connections can withstand the highest system pressures (limited only by the tube rating) and a wide temperature range, making them ideal for critical and severe service applications.
Optimal Flow Characteristics: The smooth, uninterrupted internal bore of weld fittings minimizes turbulence, pressure drop, and the risk of contamination entrapment, which is essential for high-purity and high-flow systems.
Superior Corrosion & Fatigue Resistance: Made from AISI 316/316L stainless steel, these fittings offer excellent resistance to corrosive media and stress cracking. The welded construction also provides outstanding resistance to vibration and thermal cycling fatigue.
Space-Saving & Clean Design: Welded systems have a compact profile, require no wrench clearance for assembly, and present a clean, professional appearance without external nuts or ferrules.
| Parameter | Specification / Description | |
|---|---|---|
| Design Standard | DIN 2353 | ISO 8434-1 (Welded End Configuration) |
| Connection Type | Butt Weld for Tube-to-Tube and Tube-to-Manifold connections. | |
| Primary Material | AISI 316 / 316L Stainless Steel (1.4401 / 1.4404). Other grades (304, 321) available on request. | |
| Pressure Rating | Rated to match or exceed the pressure capacity of the connecting seamless stainless steel tubing. | |
| Temperature Range | Continuously operational across the full temperature range of AISI 316 stainless steel. | |
| Tube Compatibility | Metric Stainless Steel Tubing with matching outer diameter (OD) and wall thickness. Common sizes: 6mm, 8mm, 10mm, 12mm, 15mm, 18mm, etc. | |
| Weld Preparation | Ends are typically precision-machined with a slight bevel to ensure optimal penetration and alignment for TIG (GTAW) or Orbital Welding. | |
| Configuration | Weld Unions (Tube Butts), Weld Elbows (90°, 45°), Weld Tees, Weld Crosses, Weld Reducers. | |
| Surface Finish | Mill finish, pickled & passivated, or electropolished for ultra-high-purity applications. |
DIN 2353 weld fittings are the preferred choice for systems where reliability is non-negotiable:
High-Pressure Hydraulics: Power generation, test stands, and heavy machinery where system pressure exceeds the limits of compression fittings.
Process & Chemical Industry: Lines carrying aggressive, toxic, or high-value media where leakage is unacceptable.
Pharmaceutical & Bio-Tech: Sanitary and high-purity systems requiring smooth, cleanable, and crevice-free connections (often with electropolished finish).
Food & Beverage: Process lines where hygiene and cleanability are paramount.
Semiconductor Manufacturing: Ultra-high-purity gas and chemical delivery systems.
Marine & Offshore: Hydraulic and fuel lines in corrosive saltwater environments.
System Design Note: Welded systems require careful planning. Use weld fittings in conjunction with DIN 2353 compression fittings or flange adapters at strategic points to allow for disassembly and maintenance.
To Specify, Provide:
Fitting Type & Configuration (e.g., Weld Union, 90° Weld Elbow).
Tube Outer Diameter (OD) and Wall Thickness (e.g., 12 mm x 1.5 mm).
Material Specification (e.g., AISI 316L).
Surface Finish Requirement (e.g., Passivated).
⚠️ Critical Welding Requirement: Installation must be performed by certified welders using appropriate procedures (TIG recommended) in a clean environment. Proper purging with inert gas is essential to prevent oxidation (sugaring) on the inside of the weld, which can compromise corrosion resistance and create contamination.
Engineer a permanent, high-performance fluid system. Browse our catalog of metric stainless steel weld fittings or consult our engineering team for support in designing your DIN 2353 welded tube system. We also offer precision tube preparation and orbital welding services.
Create robust, permanent hydraulic and process lines with our precision DIN 2353 Stainless Steel Weld Fittings. Engineered to the exact specifications of the DIN 2353 and ISO 8434-1 standards, these fittings are designed for direct, tube-to-tube welded connections where maximum system integrity, leak prevention, and clean fluid flow are critical. Unlike compression fittings, the welded joint eliminates potential leakage points, offering superior performance in extreme pressure, high-vibration, and high-temperature applications. Fabricated from corrosion-resistant AISI 316/316L stainless steel, they ensure long-term reliability in demanding environments such as chemical processing, offshore platforms, pharmaceutical plants, and high-purity systems.
Permanent, Zero-Leak Connection: The welded joint creates a homogeneous, leak-proof connection that is integral to the tubing, eliminating the potential for seal failure common in threaded or compression fittings under extreme conditions.
Maximum Pressure & Temperature Resistance: With no seals or moving parts, welded connections can withstand the highest system pressures (limited only by the tube rating) and a wide temperature range, making them ideal for critical and severe service applications.
Optimal Flow Characteristics: The smooth, uninterrupted internal bore of weld fittings minimizes turbulence, pressure drop, and the risk of contamination entrapment, which is essential for high-purity and high-flow systems.
Superior Corrosion & Fatigue Resistance: Made from AISI 316/316L stainless steel, these fittings offer excellent resistance to corrosive media and stress cracking. The welded construction also provides outstanding resistance to vibration and thermal cycling fatigue.
Space-Saving & Clean Design: Welded systems have a compact profile, require no wrench clearance for assembly, and present a clean, professional appearance without external nuts or ferrules.
| Parameter | Specification / Description | |
|---|---|---|
| Design Standard | DIN 2353 | ISO 8434-1 (Welded End Configuration) |
| Connection Type | Butt Weld for Tube-to-Tube and Tube-to-Manifold connections. | |
| Primary Material | AISI 316 / 316L Stainless Steel (1.4401 / 1.4404). Other grades (304, 321) available on request. | |
| Pressure Rating | Rated to match or exceed the pressure capacity of the connecting seamless stainless steel tubing. | |
| Temperature Range | Continuously operational across the full temperature range of AISI 316 stainless steel. | |
| Tube Compatibility | Metric Stainless Steel Tubing with matching outer diameter (OD) and wall thickness. Common sizes: 6mm, 8mm, 10mm, 12mm, 15mm, 18mm, etc. | |
| Weld Preparation | Ends are typically precision-machined with a slight bevel to ensure optimal penetration and alignment for TIG (GTAW) or Orbital Welding. | |
| Configuration | Weld Unions (Tube Butts), Weld Elbows (90°, 45°), Weld Tees, Weld Crosses, Weld Reducers. | |
| Surface Finish | Mill finish, pickled & passivated, or electropolished for ultra-high-purity applications. |
DIN 2353 weld fittings are the preferred choice for systems where reliability is non-negotiable:
High-Pressure Hydraulics: Power generation, test stands, and heavy machinery where system pressure exceeds the limits of compression fittings.
Process & Chemical Industry: Lines carrying aggressive, toxic, or high-value media where leakage is unacceptable.
Pharmaceutical & Bio-Tech: Sanitary and high-purity systems requiring smooth, cleanable, and crevice-free connections (often with electropolished finish).
Food & Beverage: Process lines where hygiene and cleanability are paramount.
Semiconductor Manufacturing: Ultra-high-purity gas and chemical delivery systems.
Marine & Offshore: Hydraulic and fuel lines in corrosive saltwater environments.
System Design Note: Welded systems require careful planning. Use weld fittings in conjunction with DIN 2353 compression fittings or flange adapters at strategic points to allow for disassembly and maintenance.
To Specify, Provide:
Fitting Type & Configuration (e.g., Weld Union, 90° Weld Elbow).
Tube Outer Diameter (OD) and Wall Thickness (e.g., 12 mm x 1.5 mm).
Material Specification (e.g., AISI 316L).
Surface Finish Requirement (e.g., Passivated).
⚠️ Critical Welding Requirement: Installation must be performed by certified welders using appropriate procedures (TIG recommended) in a clean environment. Proper purging with inert gas is essential to prevent oxidation (sugaring) on the inside of the weld, which can compromise corrosion resistance and create contamination.
Engineer a permanent, high-performance fluid system. Browse our catalog of metric stainless steel weld fittings or consult our engineering team for support in designing your DIN 2353 welded tube system. We also offer precision tube preparation and orbital welding services.
