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Custom Tubular Assembly Services

Tubular Assembly

G & J Steel & Tubing, Inc. can build custom assemblies to customer requirements. In addition to fabricating the parts in our machine shop, we offer such assembly services as MiG welding, TiG welding, laser welding and brazing. Welding and brazing services are performed in-house. For services requiring furnace processing and laser welding we use highly qualified and certified sub-contract vendors.

Testing services are available for all assembled products including pressure/leak testing, mechanical, tensile, hardness and chemical property testing.

We can also install fastening hardware (tube fittings, flare nuts and sleeves) and custom mounting hardware (brackets and fittings) using many methods including riveting, mechanical locking, gluing or welding. Some example applications include burner assemblies and gas line assemblies.

G & J Steel & Tubing was the developer of a proprietary, patent-pending design for a pilot tube and pilot fitting assembly that was superior to the industry standard in terms of reliability and ease of insertion, and was less costly. The design is still widely used in the Gas & Appliance industry.

Tubular Assemblies, End Tube Forming, and Bending

At G & J Steel & Tubing, Inc., we build tubular assemblies that perform reliably in demanding applications. Our work covers everything from simple tubes with formed ends to complex systems with multiple bends, fittings, and brackets. A big part of this capability is end tube forming, where we shape tube ends through flaring, beading, swaging, threading, and other methods to create strong, leak-proof, and precise connections. We also produce bent tubular assemblies using advanced bending techniques, allowing tubing to fit into tight spaces without losing strength. This combination of forming and bending gives our customers assemblies that are efficient, durable, and well-suited for industries such as aerospace, automotive, medical, and appliance manufacturing.

Materials and Applications

We work with stainless steel, carbon steel, copper, aluminum, brass, nickel alloys, and titanium for press applications. This range of materials allows us to support many industries with reliable tubular assemblies, end tube forming, and bent tubular assemblies:

  • Aerospace – Hydraulic lines, oxygen supply tubing, fuel transfer assemblies, and cooling systems that must perform under extreme conditions.
  • Automotive & Powersports – Brake and fuel lines, exhaust components, and bent tubing for suspension or chassis systems.
  • Medical – Frames for medical devices, bent tubing for carts and equipment supports, and fluid transfer lines for specialized instruments.
  • Appliances & Gas Systems – Pilot tubes, burner assemblies, heat exchanger tubing, and refrigeration lines.
  • Utilities & Industrial – Water treatment and sewer line fittings, compressed air piping, and custom bent tubing for power generation equipment.

By combining material flexibility with precise forming and bending techniques, we supply assemblies that meet both performance and safety requirements in these industries.

Why G & J Steel & Tubing, Inc.

With decades of experience, our team has developed the skills and equipment needed to deliver assemblies that meet strict performance requirements. We’re trusted by companies that need consistent, repeatable results for critical applications. From end tube forming and welding to producing bent tubular assemblies, we handle projects of all sizes and levels of complexity.

If you need reliable tubular assemblies, precise end tube forming, or complex bent tubular assemblies, G & J Steel & Tubing, Inc. is ready to help. Contact us today to discuss your project and learn how we can build the tubing solutions that fit your exact requirements.

Technical Capabilities and Equipment

Welding ServicesAutomated Rotary Weld Cell
Brazing – hand held and rotary torch tables
Laser Welding
MiG/TiG Weld
Soldering
Testing ServicesChemical Properties Testing
Mechanical Properties Testing
Pneumatic Leak Testing
Pressure Testing
Punch Press ServicesGroove End Form
Holes Punched
Notch End Form
Assembly ServicesAssembly can include any caps, sleeves, heat shrink wrap, etc
Fittings can be assembled using compression fitting, flare-nut fitting, welding or threading
Mechanical locking includes bead locking, swaging of two parts, dimpling and press fit
Machining ServicesMilling
Grinding
Threading
Holes Drilled
Hose Barb End Form
OD Turning End Form
Chamfer End Form
Workable MaterialsAluminum
Brass
Carbon Steel
Copper
Cu Ni
Kovar
Nickel & Ni Alloys
Rodar
Stainless Steel
Titanium (Press Only)
CommentAll miscellaneous machining services available
EquipmentAutomated Rotary Weld Cell
End form machines
Hydraulic Press
MiG/TiG Weld
Pneumatic Press
Industries ServedAerospace & Aircraft
Air Compressor & Air Conditioning
Automotive
Beverage
Electronic
Engines
Gas & Appliance
Heat Exchanger
Medical
OEM
Utility (Power/Sewer/Water)

Get In Touch

G & J Steel accepts your challenge to solve ANY metal tubing problem. Email us drawing and we will get back to you with a quote.

Contact Us Request a Quote