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Custom Welded Tube Assemblies

Drawing-specific rigid tube assemblies combining straight or bent tubing, CNC-machined weld fittings, bosses, flanges and mounting brackets for hydraulic and industrial fluid routing.

Wei Xing Machinery manufactures custom welded tube assemblies and welded tubing assemblies for fixed hydraulic and industrial fluid routes. Each assembly is produced from customer drawings, 3D models or approved samples using tube cutting, bending or forming, machined fittings, fixture assembly, drawing-specified welding, post-weld cleaning and final inspection.

Custom Welded Tube Assembly Manufacturing

A welded tube assembly combines rigid tubing with machined fittings, bosses, branches, flanges or mounting brackets to create a repeatable fluid route for hydraulic and industrial equipment. We review tube centerlines, bend radii, end orientation, weld locations, mounting points and sealing interfaces before quotation.

Connection ends may include drawing-specified JIC, ORFS, BSP, NPT, flange or custom interfaces. Pressure-boundary tube joints, structural support welds and connection-end sealing functions must be identified separately in the drawing and manufacturing requirements.

Custom Welded Tube Assembly Specifications

Product TypeDrawing-specific rigid welded tube assemblies for fixed hydraulic and industrial fluid routing.
Typical ComponentsStraight or bent tubing, CNC-machined weld fittings, bosses, branches, flanges, mounting brackets and drawing-specified connection ends.
MaterialsCarbon steel and stainless steel. Other weldable materials are reviewed according to the drawing, joint design, media, corrosion exposure and manufacturing requirements.
Tube GeometryTube outside diameter, wall thickness, centerline route, bend radii, end-to-end dimensions and orientation are controlled according to the approved drawing.
Connection EndsDrawing-specified JIC, ORFS, BSP, NPT, flange, weld-end or custom-machined interfaces.
Manufacturing ProcessTube cutting, bending or forming, CNC machining of fittings, weld-end preparation, fixture assembly, drawing-specified welding, post-weld cleaning and final inspection.
Surface FinishMaterial-compatible finishes such as trivalent zinc plating or zinc-nickel coating for suitable carbon-steel components, and passivation or natural finish for stainless steel, subject to drawing requirements.
Inspection BasisAssembly datums, tube route, end orientation, mounting points, weld requirements, sealing interfaces and drawing-specified inspection or testing requirements.
Drawing Support2D drawings, 3D models, physical samples and assembly information can support quotation and manufacturing review.

Welded Tube Assemblies vs Hose Assemblies and Bent Tubes

Component TypeConstructionMain Design FocusTypical Application
Welded Tube AssembliesRigid tube route with drawing-specified welded joints, machined fittings and optional mounting brackets.Tube centerline, weld locations, port orientation, mounting points, cleanliness and inspection scope.Fixed hydraulic or industrial fluid routes in OEM equipment.
Hydraulic Hose AssembliesFlexible hose with crimped or reusable end fittings.Hose length, bend radius, movement, vibration and crimp compatibility.Moving joints, vibration areas and service-replaceable connections.
Custom Bent TubesFormed rigid tubing with fewer welded joints.Bending radius, springback, end forming and installation route.Compact fixed tube routes where the geometry can be formed from one tube.
Threaded Adapter ConnectionsSeparate components joined by threaded or face-seal interfaces.Thread form, sealing structure, assembly access and serviceability.Detachable hydraulic connections and equipment interfaces.

Critical Design Requirements

Tube Route and Centerline

Tube centerlines, bend radii and end-to-end dimensions must match the approved assembly route.

End Orientation and Sealing Interfaces

Port direction, sealing faces, thread orientation and wrench access must match mating equipment.

Pressure-Boundary Weld Identification

Drawings should distinguish joints that retain fluid pressure from bracket or support welds.

Weld-End Preparation and Fit-Up

Joint geometry, gap, alignment and component fit-up are reviewed before drawing-specified welding.

Brackets and Mounting Points

Bracket position, mounting-hole location and equipment clearance are controlled from assembly datums.

Fixture and Distortion Control

Fixtures, welding sequence and intermediate inspection help control route, angle, flatness and end orientation.

Internal Cleanliness and End Protection

Post-weld cleaning and end protection requirements are reviewed according to the drawing and order scope.

Coating and Protected Surfaces

Threads, sealing faces, internal surfaces and fitted areas are protected or masked when required.

Manufacturing Capabilities for Welded Tube Assemblies

The manufacturing route is selected according to tube geometry, material, joint design, connection ends and the approved drawing. Not every assembly requires every operation listed below.

Material and Drawing Verification

Confirm the latest drawing revision, material grade, tube size, wall thickness and assembly requirements before production.

Tube Cutting and End Preparation

Cut tubing to the required length and prepare ends for bending, welding or connection interfaces.

Tube Bending or Forming

Form drawing-specific routes while reviewing bend radii, centerlines, straight sections and end orientation.

CNC-Machined Fittings and Bosses

Machine weld fittings, branches, bosses, flanges and connection features according to the approved design.

Weld-End Preparation and Fit-Up

Review joint preparation, alignment, gap and component fit-up before welding.

Fixture Assembly and Route Control

Use assembly fixtures and intermediate checks to control routing, port direction, brackets and mounting points.

Drawing-Specified Welding

Perform welding according to the approved material, joint design and project manufacturing requirements.

In-Process Dimensional Inspection

Check critical route dimensions and orientation before later operations make correction difficult.

Post-Weld Cleaning

Remove chips, spatter, loose oxides and residual contamination according to the required cleaning scope.

Surface Finish Coordination

Review coating compatibility, masking and protected functional surfaces according to material and drawing requirements.

Final Dimensional and Interface Inspection

Verify assembly datums, end orientation, threads, sealing interfaces, mounting points and key dimensions.

Drawing-Specified Testing and Packaging

Leak, pressure, nondestructive or other testing and special end protection are included only when agreed during quotation.

Materials and Surface Finish Options

Material grade, tube form, fitting material, weld-end design and surface finish are reviewed according to the drawing, media, temperature, corrosion exposure and manufacturing requirements.

Typical material options include carbon steel and stainless steel. Other weldable materials are reviewed only when the material combination, joint design and project requirements are clearly defined.

Suitable carbon-steel components may use trivalent zinc plating, zinc-nickel coating or another drawing-specified finish. Stainless-steel components may use passivation or a natural finish. Threads, sealing faces, tube interiors and fitted areas are protected or masked when required.

Welded Tube Assembly Quality Control

Drawing and Material Verification

Review drawing revision, material, tube size, wall thickness and connection requirements.

Tube Route and Bend Inspection

Check centerlines, bend locations, straight sections and end distances before assembly.

Weld-End Fit-Up Inspection

Review joint preparation, alignment and component fit-up before welding.

Fixture and Port-Orientation Control

Control tube route, bracket location, port direction and mounting interfaces during assembly.

Visual Weld Inspection

Inspect accessible weld appearance according to the agreed manufacturing and acceptance requirements.

Final Dimensional Inspection

Verify assembly datums, end orientation, mounting points, threads and sealing interfaces.

Post-Weld Cleaning and End Protection

Remove manufacturing contamination according to the specified scope and protect clean ends and functional surfaces.

Drawing-Specified Leak, Pressure or Additional Testing

Testing is performed only when the required method, pressure, duration and acceptance criteria are included in the approved order scope.

Applications for Welded Tube Assemblies

Construction Machinery

Fixed hydraulic tube routes for excavators, loaders, cranes, attachments and related equipment.

Agricultural Equipment

Rigid tubing assemblies for tractors, harvesters and hydraulic implements.

Hydraulic Power Units

Compact tube routes connecting pumps, valves, filters, reservoirs and auxiliary components.

Industrial Machinery

Fluid lines for presses, lifting equipment, fixtures and production systems.

Material Handling Equipment

Rigid hydraulic routing for lifting, conveying and mobile handling equipment.

OEM Replacement and Custom Equipment

Made-to-drawing assemblies where tube route, end orientation and mounting features must be reproduced.

Information Required for Quotation

Drawings and Models

Latest 2D drawings, 3D models, assembly drawings, revision information and physical samples when available.

Tube and Material

Tube material, grade, outside diameter, wall thickness and fitting or boss materials.

Route and Assembly Datums

Tube centerlines, bend radii, end-to-end dimensions, mounting datums, bracket positions and installation space.

Welds and Connection Ends

Pressure-boundary weld locations, support welds, joint details, JIC, ORFS, BSP, NPT, flange or custom end interfaces.

Operating Conditions

Media, temperature, system pressure, operating duty, vibration, corrosion exposure and mating equipment.

Order and Inspection Requirements

Prototype or production quantity, surface finish, cleanliness, leak or pressure testing, documentation, packaging and end protection.

Testing Scope and Engineering Responsibility

The final pressure capability and system suitability of a welded tube assembly depend on the tube material and dimensions, joint design, welded connections, machined fittings, end interfaces, media, temperature and operating duty. Visual and dimensional inspection alone does not establish pressure integrity.

Leak, proof-pressure, burst, impulse, nondestructive or other testing is performed only when the required method, pressure, duration, sample quantity and acceptance criteria are included in the approved drawing, order or validation plan.

Frequently Asked Questions

What is a welded tube assembly?
A welded tube assembly is a drawing-specific rigid fluid-routing component made from straight or bent tubing, machined fittings, bosses, branches, flanges or mounting brackets.

How is it different from a hydraulic hose assembly?
A welded tube assembly provides a fixed rigid route, while a hose assembly provides flexibility for movement, vibration or service replacement.

What materials are available?
Carbon steel and stainless steel are typical options. Other weldable materials are reviewed according to the drawing, joint design and project requirements.

Which connection ends can be included?
Assemblies may include drawing-specified JIC, ORFS, BSP, NPT, flange, weld-end or custom-machined interfaces.

How are tube routing and port orientation controlled?
Assembly fixtures, datum checks and intermediate dimensional inspection help control tube centerlines, end direction, bracket positions and mounting points.

Are all welds pressure-boundary welds?
No. Drawings should distinguish welded joints that retain fluid pressure from brackets or support welds that provide mechanical positioning.

Are all welded tube assemblies pressure tested?
No blanket test claim is made. Leak, pressure or additional testing is performed only when the method and acceptance criteria are included in the approved order scope.

What information is required for quotation?
Provide drawings or models, tube and material specifications, route dimensions, connection ends, weld requirements, operating conditions, quantity, finish and inspection requirements.

Send Your Welded Tube Assembly Drawing

Share your tube size, route, connection ends, material, quantity and inspection requirements so we can review the assembly and prepare a quotation.