LTB Tube Butt Weld Ultrahigh-Purity Fitting

Product Details

• Product Name:LTB Tube Butt Weld Ultrahigh-Purity Fitting
• Material:316 ,316L,316L VAR,316L VIM-VAR
• Design: ASME B31.1, ASME B31.3
• Size:Sizes range from 1/4″ to 1″ and 6 mm to 18
• VariousTypes:  Unions,Elbows,Tees,Cross
• Features:

 

• Extended tube design
• Machined from forging blanks except for straight configurations
• Sizes range from 1/4″ to 1″ and 6 mm to 18 mm
• Radius junction design with elbows to provide smooth flow path

 

• Precision machined diameter to match tube diameter
• Square, burr-free tube weld ends to enhance alignment
• Manual or automatic welding equipment applicable
• Tube wall uniformity to promote weld repeatability
• Standard surface roughness finished to an average of Ra 10 μin. (0.25 μm) to Ra 5 μin. (0.13 μm) optional
• Each fitting marked with brand, material and tracing ID

 

Application:

1. Semiconductor and Integrated Circuit Manufacturing

This field has the most stringent cleanliness requirements and represents the primary application scenario for these technologies.

 

Application Scenarios:

Gas Delivery Systems: Transporting specialty process gases such as silane, helium, argon, and doping gases. Any minute particles or impurities can lead to the scrapping of an entire batch of wafers.

Chemical Delivery for Chemical Mechanical Polishing (CMP) and Wet Etching.

Connections for Vacuum Systems and Chamber Internal Components.

 

Why It’s Critical:

The inner surfaces are electropolished (EP) or mechanically polished (MP) to a mirror finish, ensuring no dead legs, no adsorption, and no release of contaminants (particles, metal ions, organic residues).Provides smooth, seamless welds with internal surface quality matching that of the fittings themselves, avoiding dead zones, leaks, and particle shedding possible with threaded or compression fittings.

 

2. Biopharmaceuticals and Life Sciences

Extreme requirements for product purity, sterility, and prevention of cross-contamination.

 

Application Scenarios:

Process Piping for Bioreactors and Fermenters.

Fluid Paths in Purification Systems (e.g., chromatography columns, ultrafiltration systems).

Distribution Systems for Water for Injection (WFI) and Pure Steam (PS).

Interface Welding for Single-Use Bioprocess Bags in Cell and Gene Therapies.

 

Why It’s Critical:

Prevents Microbial Growth: Smooth, seamless internal surfaces prevent liquid retention, eliminating bacterial biofilm formation.

Ensures Drug Efficacy: Avoids leaching of metal ions or ingress of impurities that could affect protein structure or cell viability.

Regulatory Compliance: Meets stringent cGMP, FDA, and EMA requirements for cleanliness and verifiability of pharmaceutical equipment.

 

3. Photovoltaics and Flat-Panel Displays (LED, OLED)

Similar to semiconductors but more cost-sensitive in certain segments, though cleanliness requirements remain very high.

 

Application Scenarios:

Gas Delivery Lines for Thin-Film Deposition (CVD, PVD).

Supply Systems for Specialty Gases (e.g., ammonia, silane).

Chemical Delivery in Display Panel Manufacturing.

 

Why It’s Critical:

Improves Yield: Clean piping systems are essential for ensuring uniform, defect-free large-area thin films.

Safety: Many process gases are toxic, corrosive, or pyrophoric; reliable welding and fittings are foundational to safe operation.

 

4. Aerospace and Defense

Extreme demands for system reliability, lightweight design, and performance in harsh environments.

 

Application Scenarios:

Aircraft Hydraulic and Fuel Systems: Require leak-free operation, high-pressure resistance, and vibration fatigue resistance.

Fuel and Oxidizer Lines for Rocket Engines.

Fluid Control in Satellite Propulsion Systems and Life Support Systems.

Installation and Connection of High-Precision Sensors.

 

Why It’s Critical:

Micro Weld Fittings(e.g., laser welding, electron beam welding): Enables precision welding with high depth-to-width ratios and minimal thermal distortion, ensuring joint strength equal to the base material and reduced weight.

 

 

5. Analytical and Laboratory Equipment

Provides accurate, contamination-free sample and carrier gas flow paths for instruments.

 

Application Scenarios:

Flow Paths and Connections for Gas Chromatography/Mass Spectrometry (GC/MS) and High-Performance Liquid Chromatography (HPLC).

Supply Lines for High-Purity Carrier Gases (e.g., helium, nitrogen).

Semiconductor-Grade Online Analytical Instruments.

 

Why It’s Critical:

Ensures Analytical Accuracy: Any piping contamination can cause baseline noise, ghost peaks, or detector contamination, distorting results.

Enhances Instrument Sensitivity: A clean system is prerequisite for maximizing the performance of high-end instruments.

 

6. Food and Beverage Industry (High-End Segments)

Applied in settings requiring aseptic filling or handling of sensitive ingredients.

 

Application Scenarios:

Aseptic Transfer and Filling Lines for Beer, Wine, and Juice.

Processing Piping for Dairy Products (e.g., UHT milk).

Production of Premium Bottled Water.

 

Why It’s Critical:

Preserves Flavor and Shelf Life: Prevents microbial and odor contamination.

Facilitates Cleaning and Sterilization (CIP/SIP): Smooth, seamless surfaces allow rapid and thorough cleaning and steam sterilization.