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Smoothbore

Product catalog summary

Introduction to PTFE Lined Flexible Hose
PTFE, or Polytetrafluoroethylene, is renowned for its chemical resistance, temperature resilience, and non-stick properties. It consists of carbon atoms linked to fluorine atoms, forming a protective helical spiral around the carbon chain.

Key Properties of PTFE

Chemical Resistance: PTFE is resistant to most chemicals, except for fluorine gas at high temperatures and pressures.
Non-Stick Surface: Its non-stick nature facilitates easy cleaning, ideal for applications requiring thorough purging.
Temperature Range: PTFE withstands temperatures from -150˚C to +260˚C, suitable for diverse applications.

Hose Design and Grades
Various grades of PTFE lined hoses are designed for specific applications:

Standard Smoothbore Hose Grades: Available with single or double stainless steel wire braid for general and high-pressure applications.
High Pressure Smoothbore Hose Grades: Suitable for applications exceeding 100 Bar, using materials like Aramid Fibre and Stainless Steel for enhanced performance.

Specifications and Applications

Single Braid Hose: Suitable for general applications, with specifications for temperature and pressure adjustments.
Double Braid Hose: Offers higher pressure resistance, with specific guidelines for temperature and pressure management.

Ordering and Quality Assurance
Guidelines for ordering hoses and end fittings are provided, along with information on quality assurance and certification processes.

Conclusion
PTFE lined hoses are optimal for applications requiring chemical resistance, temperature resilience, and easy cleanability. The document provides comprehensive specifications and guidelines for selecting the appropriate hose grade for various industrial applications.

Overview: The document details specifications and guidelines for PTFE tube liners and hose covers, focusing on high-pressure gas (HPG) and antistatic (AS) grades, and various hose cover materials.

Specifications:

HPG Grade PTFE Tube Liners: Designed for high-pressure gas applications, requiring post-sintering processes to enhance resistance to penetration and porosity. HPG specification involves testing with compressed air or nitrogen at 275 Bar for 10 cycles.
AS Grade PTFE Tube Liners: Essential for applications with a risk of electrostatic charge build-up. Made from FDA-approved PTFE with carbon black material, suitable for fluids with low conductance.

Design & Approval: Aflex Hose manufactures AS Grade liners with FDA-approved materials, ensuring no contamination from carbon black. HPG/AS Grade liners have a mixed wall thickness for specific applications.

Hose Cover Options:

Plastic Covers: Available in PVC, Nylon II, Hytrel, and Sarlink, used for protection, coloring, or printing. PVC covers are popular for motorbike brake hoses.
Rubber Covers: EPDM and silicone rubber covers are available, with specific temperature ranges and pricking requirements for gas applications.

Limitations: The application of covers affects the operating temperature range, with specific limits for each material type.

End Fittings: Aflex Hose provides a range of PTFE-tail and hydraulic-tail end fittings, with specifications for different hose grades and materials.

Ordering Information: Guidelines for specifying hose size, grade, and end fittings, including part numbers and descriptions. Special crimp tools are required for PTFE-tail fittings.

Testing & Safety: Emphasizes the importance of hydrostatic pressure testing for hose assemblies, especially when used with hazardous materials. Recommendations for pressure testing in situ before service.

Chemical Compatibility: PTFE liners react with certain chemicals like fluorine and chlorine, and are resistant to most other chemicals. Special considerations are needed for gas/fluid cycling applications.

Connection Guidelines: Proper connection techniques and pressure testing are crucial for safety and performance in applications involving expensive or dangerous fluids.

Special Applications
Aflex Hose PTFE lined hose products are not suitable for radioactive applications involving high energy radiation, medical implantation, or aerospace applications.

Smoothbore Hose Usage Conditions
Ensure the bend radius of the hose is never less than the Minimum Bend Radius (MBR). Flexing should occur away from end fittings to prevent stress. Avoid external abrasion and torque during connection or flexing.

Quality Assurance and Certifications
Aflex products comply with BS EN ISO 9001:2008 and TS16949 standards. The materials used conform to FDA regulations and 3-A Sanitary Standards. Automotive fuel hoses are approved under SAE J1737. CE marking and ATEX Directive attestations are available for applicable products.

Hose Configuration and Length Calculations
Correct hose configuration avoids flexing at end fittings and prevents abrasion and torque. Length calculations should consider the longest radius and include non-flexible end fittings. For complex configurations, manual measurement with flexible tubing is recommended.

Conditions of Sale
The conditions of sale form the basis of the contract between Aflex Hose and the customer. Customers must review usage conditions and limitations for intended applications. Aflex Hose provides a 24-month warranty against faulty materials or manufacturing defects, with specific conditions for ETH grade assemblies.

Product Failure
In case of product failure within the warranty period, customers must notify Aflex Hose within 48 hours and return the product for examination. Aflex Hose will reimburse shipping costs if the failure is covered by the warranty.

Liability and Warranty: Aflex Hose's liability is limited to the invoice value of the failed hose or the entire order, plus reasonable costs for removal, replacement, and return shipping. Customers assembling hoses themselves must conduct pressure testing and are responsible for design suitability.

Self-Assembly and Testing: Customers using loose hoses for self-assembly must pressure test assemblies to 1.5 times the Maximum Working Pressure (MWP) and conduct helium gas tests for leak detection. Aflex Hose is not liable for design suitability unless components are supplied or approved by them.

Untested Hose Assemblies: If non-standard fittings prevent pressure testing, a concession not to test is obtained, and the customer is warned to test before use. Aflex Hose is not liable if this warning is ignored.

Force Majeure: Aflex Hose is not liable for delays or defaults due to uncontrollable events like natural disasters, labor disputes, or governmental restrictions.

Governing Law and Jurisdiction: The agreement is governed by English Law, and disputes must be resolved in English courts. Customers waive rights to jury trials and personal service of process.

Limitations of Liability: Aflex Hose products are not for aerospace, medical implantation, or radioactive applications without written approval. Aflex Hose is not liable for special, indirect, or consequential damages.

Order Completion: Aflex Hose may consider an order complete if up to 10% more or less than the original quantity is supplied, depending on product standardization.

Notice Provisions: Notices to Aflex Hose must be sent to their specified address in West Yorkshire, UK.

Exclusion of CISG: The United Nations Convention on Contracts for the International Sale of Goods does not apply to these conditions.

Catalog excerpts

Smoothbore PTFE Lined Flexible Hose, High Pressure Hose and End Fittings • Temperature Resistant • Chemical Resistant • Self Cleaning

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PTFE - The Optimum Choice For Hose Linings PTFE, or Polytetrafluoroethylene, comprises long-chain Section from a PTFE Molecule, 16 Angstrom Units long. molecules of carbon atoms, each linked to two fluorine atoms. The fluorine atoms provide a helical spiral which surrounds the carbon chain and protects it. It is this structure which creates the unique properties for which PTFE is well-known. Excellent Chemical Resistance PTFE is renowned as the most chemically resistant material known. Only a very few, very unusual substances and conditions can affect it, like Fluorine gas at high temperature...

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Contents Front Cover PTFE - The Optimum Choice For Hose Linings Standard Smoothbore Hose Grades SW (Standard Wall), HW (Heavy Wall), MW (Medium Wall) and “Dash” Sizes Specications for Standard Hose Grades, Single Wire Braid Specications for Standard Hose Grades, Double Wire Braid High Pressure Smoothbore Hose Grades Alternative PTFE Tube Liners HPG (High Pressure Gas) and AS (Antistatic) Plastic or Rubber Hose Covers Smoothbore Hose End Fittings - PTFE Tail and Hydraulic Tail List of PTFE Tail End Fittings and Ferrules for Standard Smoothbore Hose Grades How To Order Smoothbore Hose, End Fittings...

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Standard Smoothbore Hose Grades Construction Hose Liner: Seamless extruded PTFE tube. The extrusion, heat treatment and quality control programmes are designed to produce the best quality PTFE tube possible, ensuring minimum porosity and maximum exibility. Hose Braid: Braided from AISI grade 304 stainless steel wire, bright hard drawn to a minimum 1700 N/mm2 tensile strength. The braiding process is closely controlled to ensure even tensions and the correct braid angle, to give minimum expansion/contraction under pressure. GRADES AVAILABLE, and APPLICATIONS There are 3 standard grades available,...

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Specifications for Standard Single Braid Hose and Hose Properties SPECIFICATIONS and SIZE RANGE For Single Stainless Steel wire braid hose, for Standard Grade and AS Grade STANDARD WALL, SINGLE BRAID (SW, SB) Bore Size (Nominal) PTFE Tube Wall Thickness Bore Size (Actual) Maximum Working Pressure Braid Outside Minimum Diameter Bend Radius Weight per Unit Length *Part Number HEAVY WALL, SINGLE BRAID (HW, SB) Bore Size (Nominal) 1/8 3/16 1/4 5/16 3/8 1/2 5/8 3/4 PTFE Tube Wall Thickness Bore Size (Actual) Maximum Working Pressure Braid Outside Minimum Diameter Bend Radius Weight per Unit Length...

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Specifications for Standard Double Braid Hose SPECIFICATIONS and SIZE RANGE - For Double Stainless Steel wire braid hose (DB Grade) and Antistatic (AS, DB) Grade. STANDARD WALL, DOUBLE BRAID (SW, DB) Bore Size (Nominal) PTFE Tube Wall Thickness Bore Size (Actual) Maximum Working Pressure Braid Outside Minimum Diameter Bend Radius Weight per Unit Length *Part Number HEAVY WALL, DOUBLE BRAID (HW, DB) Bore Size (Nominal) 1/8 3/16 1/4 5/16 3/8 13/32 1/2 5/8 3/4 Bore Size (Actual) Weight per Unit Length MEDIUM WALL, DOUBLE BRAID (MW, DB) also referred to as HYPERLINE SB, DB) Bore Size (Nominal) BB...

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High Pressure Smoothbore Hose Grades Construction Hose Liner: Seamless extruded PTFE tube. The extrusion, heat treatment and quality control programmes are designed to produce the best quality PTFE tube possible, ensuring minimum porosity and maximum exibility. Hose Braids: 2 braid materials are utilised: Aramid Fibre Braid - a black aramid bre named “Tecnora”, which is a high technology bre, with tensile, abrasion and temperature properties signicantly better than the older Aramid products like Kevlar. Stainless Steel Braid - Braided from AISI grade 304 stainless steel wire, bright hard drawn...

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Alternative PTFE Tube Liners High Pressure Gas (HPG) and Antistatic (AS) High Pressure Gas (HPG Grade) PTFE Tube Liners (Available to Special Order Only) For applications where gases are used in the hose at high pressures, or testing procedures above 100 bar (1500 psi) it is necessary to specify an HPG grade PTFE liner tube. HPG grade is also required when high pressures are applied to “penetrating” uids. HPG grade tubing is acheived by subjecting the PTFE tube to certain special processes, commonly known as “post sintering”, which increases the resistance of the material to penetration and porosity...

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Plastic or Rubber Hose Covers ALTERNATIVE PTFE HOSE COVER DESIGN OPTIONS Purpose For many applications, it is required that Smoothbore PTFE hose of all sizes, grades and braids should have an outer cover of a exible plastic, or rubber. This is usually required to protect the braid, or to colour the hose, or to allow printing on to the hose. Plastic Covers - available to special order PVC - exible PVC covers are the most popular, either transparent, or a wide range of solid or semi-transparent colours. A particular application is for -3 size single braid, clear PVC covered hose, used as a brake...

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Smoothbore Hose End Fittings - PTFE Tail and Hydraulic Tail PTFE TAIL END FITTINGS FOR SW AND HW GRADES Aex Hose keep in stock a wide range of “PTFE-tail” design standard end ttings, ferrules and adaptors in both zinc plated carbon steel and 316L stainless steel. These are specied, with the relevant Aex Hose Part Number, on Page 11. Standard Tube Ferrule Standard PTFE Tail BSPT Fixed Male Spigot Crimped Fitting on Hose PTFE-Tail End Fittings can only be applied to the Standard Smoothbore, Standard Wall (SW) and Heavy Wall (HW) Hose Grades. HYDRAULIC-TAIL END FITTINGS FOR MW GRADE These can only...

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List of PTFE Tail End Fittings for Standard Smoothbore Hose Grades Fitting Sizes, Types and Part Numbers Fixed Males Hose Size and Grade Fitting Material Cone Cone Seat Seat MaleFemale to-Male Union Adaptors BSPP 37˚ JIC JIC-to-NPT Female Male/Male Unions Adaptors * 1” Ferrules for HW, SB hose are 01-150-16-16-02 (and 04). Example: Part Numbers for a 1/2” NPT Fixed Male in SS is 06-110-08-08-01. Note: The last 2 digits of the Part Number indicates the material: 01=316 SS, 02 = 304 SS, 04 = Zinc Plated Carbon Steel.

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Catalog excerpts

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