Orbital Purge Caps
The Orbital Service Purge Caps are innovative external pipe sealing systems designed to improve purge gas efficiency during orbital TIG welding and high-purity pipe fabrication. Manufactured using advanced 3D-printing technology, these purge caps create a secure seal around the outside of the pipe, reducing purge gas consumption while helping produce cleaner, oxidation-free welds.
Unlike traditional internal purge devices, the Purge Caps feature dual TPU air cushion seals that expand evenly around the pipe's exterior when tightened, creating a stable, leak-resistant seal without entering the pipe bore. This design simplifies setup while improving purge gas containment across a wide range of stainless steel tubing and process piping applications.
Available for pipe outside diameters from Ø 6 mm to Ø 323 mm (1/4" to 12¾"), the Orbital Service Purge Caps are well suited for pharmaceutical, semiconductor, food and beverage, aerospace, and other high-purity welding environments where purge quality directly impacts weld integrity.
Key Features
- World's first 3D-printed external purge cap system
- Designed for orbital TIG welding and high-purity pipe fabrication
- Creates a secure external seal to improve purge gas containment
- Dual TPU air cushion sealing technology provides even sealing pressure around the pipe
- Helps reduce purge gas consumption and purge times
- Supports cleaner, oxidation-free internal welds
- Large threaded union nut provides fast, secure installation
- Compatible with Swagelok® and Festo/SMC-style purge gas fittings
- Lightweight yet durable PETG construction
- Patent-pending design
- Suitable for cleanroom and contamination-sensitive environments
- Available for pipe outside diameters from Ø 6 mm to Ø 323 mm (1/4" to 12¾")
Applications
The Orbital Service Purge Caps are designed for external pipe sealing during weld purging, helping improve purge efficiency while reducing gas consumption in precision welding applications.
Typical applications include:
- Orbital TIG welding
- High-purity process piping
- Pharmaceutical piping systems
- Semiconductor tubing installations
- Food and beverage process piping
- Aerospace fabrication
- Stainless steel tube and pipe welding
- Cleanroom fabrication environments
- Precision process piping installations
Their external sealing design makes the purge caps especially valuable where contamination control, rapid setup, and consistent purge quality are essential before orbital welding.
System Configuration & Design
The Orbital Service Purge Caps utilize an innovative external sealing system manufactured through advanced 3D-printing technology.
Rather than sealing inside the pipe, the caps clamp securely around the outside diameter using dual inflatable TPU air cushion seals that expand evenly as the union nut is tightened. This creates a reliable gas-tight seal while leaving the pipe bore unobstructed.
Core system features include:
- Advanced 3D-printed PETG body construction
- Dual TPU air cushion sealing system
- Large threaded union nut for secure installation
- External sealing design for rapid setup
- Compatible with Swagelok® and Festo/SMC fittings
- Lightweight construction for easy handling
- Patent-pending engineering
Available sizes cover pipe outside diameters from Ø 6 mm to Ø 323 mm (1/4" to 12¾"), allowing the system to accommodate everything from small instrumentation tubing to large process piping.
Why Choose Orbital Service Purge Caps?
Maintaining a stable purge atmosphere is essential for producing high-quality stainless steel welds. The Orbital Service Purge Caps help improve purge efficiency by creating a reliable external seal that reduces purge gas loss while simplifying setup.
Their lightweight construction, innovative sealing technology, and broad size range make them an excellent solution for fabrication shops and field installations where productivity and weld quality are equally important.
Key advantages include:
- Helps reduce purge gas consumption
- Improves purge efficiency and internal weld quality
- Creates a secure external seal without entering the pipe bore
- Fast installation and removal
- Lightweight, durable 3D-printed construction
- Compatible with common industrial purge gas fittings
- Suitable for high-purity and contamination-sensitive applications
- Covers pipe sizes from Ø 6 mm to Ø 323 mm (1/4" to 12¾")
For orbital welding applications where purge quality directly affects weld integrity, the Orbital Service Purge Caps provide a practical, reusable solution for improving efficiency and repeatability.
Technical Specifications
| Specification | Details |
|---|---|
| Product Name | Orbital Service Purge Caps |
| Product Type | External Pipe Purge Sealing System |
| Pipe OD Range | Ø 6 mm – Ø 323 mm (1/4" – 12¾") |
| Body Material | PETG |
| Air Cushion Material | TPU |
| Sealing Method | Dual external air cushion seals |
| Manufacturing Method | Advanced 3D Printing |
| Compatible Fittings | Swagelok®, Festo/SMC |
| Design Status | Patent Pending |
| Application | Weld purging for orbital TIG welding and high-purity pipe fabrication |
Frequently Asked Questions
What are Orbital Service Purge Caps used for?
Purge Caps create a gas-tight external seal on the ends of pipe during weld purging, helping reduce purge gas consumption and improve weld quality during orbital TIG welding.
How do Purge Caps differ from internal purge plugs?
Unlike internal purge plugs, Purge Caps seal around the outside of the pipe using inflatable TPU air cushions. This leaves the inside diameter unobstructed while providing a secure purge seal.
What pipe sizes are available?
The Purge Cap range covers pipe outside diameters from Ø 6 mm to Ø 323 mm (1/4" to 12¾"), making them suitable for a wide variety of tube and pipe applications.
What materials are the Purge Caps made from?
The body and union nut are manufactured from durable PETG, while the sealing cushions are made from flexible TPU for reliable sealing performance.
Are they suitable for high-purity applications?
Yes. They are designed specifically for high-purity welding environments, including pharmaceutical, semiconductor, food and beverage, and aerospace applications.
What fittings are compatible with the Purge Caps?
The Purge Caps are compatible with commonly used Swagelok® and Festo/SMC purge gas fittings.
Can the Purge Caps help reduce purge gas costs?
Yes. By creating a secure external seal, they help minimize purge gas loss, reducing gas consumption and shortening purge times before welding.
Are the Purge Caps reusable?
Yes. Their durable PETG construction and TPU sealing system are designed for repeated use in demanding fabrication environments.
