The tube material is first made through a process of cold head extrusion and the tetraflouroetheylene powder is transformed into a smooth, virgin tube of PTFE, as per CGA E-9 (2017) section 4.1. Weldcoa then takes that PTFE smooth tube material and performs, in-house, a post-sintering process that re-bakes the PTFE tube material at a controlled time and temperature, increasing the wall thickness and tightening the molecular bond, which dramatically reduces effusion rate. By making these voids as small as possible, it closes the path a gas molecule will follow while under pressure making the PTFE more "dense". Post-sintered PTFE provides the lowest effusion rate possible while maintaining the highest flexibility and most robust inner core.
1/4" Post-sintered ptfe lined leads - 3000 psi
This lead utilizes a single stainless steel braid around a flexible tube made out of post-sintered PTFE material.
Weldcoa’s 1/4" 3000 PSIG Post-Sintered PTFE Lined Flexible Leads have been widely specified for a variety of applications in the gases industry. These leads can be found in cylinder discharging applications, industrial manufacturing plants, medical institutions, pharmaceutical manufacturing, laboratories, and numerous other facilities.
Weldcoa’s 1/4" 3000 PSIG PTFE Lined Flexible Leads are a cost effective, reliable option for handling the most common Industrial gases, Medical gases and Specialty gases such as Oxygen, Nitrogen, Argon, Carbon Dioxide, Helium and other inert and flammable gases and gas mixtures.
NOTE: PFTE lined leads are not recommended for Helium and Hydrogen discharging applications. See the Metallic Lined Hose section for available options.
1/4" Post-sintered ptfe lined leads - 3600 psi
This lead utilizes a double stainless steel braid around a flexible tube made out of post-sintered PTFE material.
Weldcoa’s 1/4" 3600 PSIG Post-Sintered PTFE Lined Flexible Leads have been widely specified for a variety of applications in the gases industry where the 3000 PSIG leads do not provide the desired working pressure. These leads can be found in cylinder charging plants, cylinder discharging applications, industrial manufacturing plants, medical institutions, pharmaceutical manufacturing, laboratories, and numerous other facilities.
Weldcoa’s 1/4" 3600 PSIG Post-Sintered PTFE Lined Flexible Leads are a cost effective, reliable option for handling the most common Industrial gases, Medical gases and Specialty gases such as Oxygen, Nitrogen, Argon, Carbon Dioxide, Helium and other inert and flammable gases and gas mixtures.
1/4" Post-sintered ptfe lined leads - 6000 psi
This heavy duty lead utilizes one inner braid, four spiral layers and an outer braid (all stainless steel) to provide one of the most rugged leads available for gas transfer applications.
Weldcoa’s 1/4" 6000 PSIG Post-Sintered PTFE Lined Flexible Leads are used to meet the ultra-high pressure needs of the industrial gas and specialty gas industries. These leads are commonly used for the charging and discharging of ultra-high pressure compressed gas cylinders or other severe service applications. These flexible leads are available for handling most common Industrial and Specialty gases such as Nitrogen, Argon, Super-critical Carbon Dioxide, Helium and other inert and flammable gases and gas mixtures.
Quality control methods and meticulous attention to detail throughout the manufacturing process ensure that our customers will receive a leak-free lead that will provide years of service. This detail and commitment to the entire process helps make Weldcoa's PTFE lead products the very best in the industry.
- Maximum allowable working pressure (MAWP) is based on a 4:1 Safety Factor. Therefore all of our non-metal leads' minimum burst level is Four Times Maximum Allowable Working Pressure
- Every lead is 100% Hydrostatically pressure tested to 1.5 times the MAWP
- Then 100% Nitrogen leak tested
- Then 100% Externally cleaned to remove lubricants and debris
- Then 100% Internally oxygen cleaned, dried, bagged to the highest safety standards including CGA's G-4.1 requirements.
- All Weldcoa flexible lead assemblies meet CGA E-9 (2017) Section 6.1.6 Pneumatic Effusion Requirements
- Weldcoa post-sintered flexible leads have passed several difficult levels of testing either by an independent lab or internally in each stage of production.
- All Weldcoa Leads are made in the USA