*The 7/8”, 13/8” and 17/8” hose sizes are only suitable for use with PTFE lined sanitary clamp (or triclover) end fittings and PTFE lined I-Line end fittings
Bioflex Ultra Sizes, Grades, Pressures & Weights
* The 7/8”, 13/8” and 17/8” hose sizes are only suitable for use with PTFE lined sanitary clamp (or triclover) end fittings and PTFE lined I-Line end fittings.
** The Maximum Working Pressure of a hose assembly is limited to the lowest of the MWP's of either of the two end fittings, or of the hose itself as listed above. The MWP of the hose reduces as the operating temperature increases as specified in the Graph.
Labeling & Coding
All Bioflex Ultra hose assemblies are labeled with the following information:
*Note any restrictions on working pressure resulting from elevated temperatures.
This information is normally laser-etched on to a loose stainless steel Ring mounted on the hose.
In some cases, at the discretion of Aflex Hose, the information may be etched on to a thin stainless steel plate which is clamped to the hose, or on to the end fitting ferrule at one end. This may be necessary for example, if the customer requires additional information which may not fit on to a Ring.
Customers may specify which labeling system they require, and may request additional information on the label.
This system is only applicable to the Silicone (SI) rubber covered grades of Bioflex Ultra that have a stainless steel (SS) braid.
A label and/or Color Code is placed around the silicone cover of the hose and then encapsulated by a transparent silicone that is formed into a thin streamlined cover.
Note: 1/2” size, Color Code only, no text.
This system is applicable to all grades of Bioflex Ultra hose.
A colored PTFE spiral strip is wound on to the hose.
It can be left loose, or it can be encapsulated under a transparent, heat-shrunk polyolefin sleeve.
Quality Assurance & Certification
EN ISO 9001:2008
Aflex products are all manufactured in accordance with BS EN ISO 9001: 2008 Quality Management Systems independently assessed and registered by The British Standards Institution (BSI).
Bioflex Ultra meets the requirements of EN 16643 (SC), which include the electrical and electrostatic requirements of hose assemblies.
Aflex Hose Ltd manufactures PTFE flexible hose for the automotive industry in accordance with TS16949 and is assessed and certified by The British Standards Institution (BSI).
Aflex Hose Ltd have been successfully assessed to the requirements of ISO 14001, by the British Standards Institution (BSI). By gaining this accreditation Aflex Hose Ltd are demonstrating our commitment to reducing our impact on the environment.
USP Class VI and ISO 10993-5, 6, 10 and 11 guidelines
Natural and Antistatic PTFE Hose Liners, Platinum Cured Silicone Rubber Covers (White and Clear) and EPDM Rubber Cover (Blue) have been independently tested in accordance with USP protocols and are found to conform to the requirements of USP Class VI Chapter <88>.
Natural and Antistatic PTFE Hose Liners now also meet the more stringent USP Class VI and ISO 10993-6,10 and 11 guidelines at 121˚C (250˚F) with a “no reaction” classification.
Natural and Antistatic PTFE Hose Liners and Platinum Cured Silicone Rubber Covers (White and Clear) have also been tested in accordance with USP protocols and are found to conform to the requirements of USP Class VI <87>, the L929 MEM Elution Test and are considered non-cytotoxic.
Natural and Antistatic PTFE Hose Liners have now been further tested and have passed the more stringent USP Class VI and ISO 10993- 5 guidelines at 121˚C (250˚F).
USP <661> Physicochemical Test for Plastics
Natural and Antistatic (Carbon filled) Externally Convoluted Smoothbore PTFE hose has been tested in accordance with USP Physicochemical Test for Plastics and found to meet the criteria of the following reference: USP34, NF 29, 2011. Monograph <661> Containers, Physicochemical Test-Plastics.
The Materials used to manufacture the natural PTFE Tube liner conforms to FDA 21 CFR 177.1550, and the antistatic PTFE liner conforms to FDA 21 CFR 178.3297.
3-A Sanitary Standards
Bioflex Ultra hose assemblies accredited to 3-A Sanitary Standards are identified within the product brochure.
BPSA leachables and extractables testing
Aflex Hose Natural and Antistatic PTFE Hose Liner Tube has been independently tested in accordance with BPSA recommendations, and found to be satisfactory.
Copies of the Test Report are available for specific assessments to be made.
To special order only, Aflex Hose are able to supply hose with a special rubber cover which is compliant with the requirements of BS EN 45545, DIN 5510 and NFF 16101 specifications.
Pharmaceutical Manufacturers Approvals
Most of the major pharmaceutical manufacturing companies in the world have audited and/or approved Aflex Hose as a Hose Supplier.
CE Marking (Europe only)
Aflex has been assessed by The British Standards Institution (BSI) and found to comply with the Pressure Equipment Directive 2014/68/EU (European Community) Conformity Assessment Module D1, approved to CE Mark applicable hose products, accompanied by a Hose Usage Data Sheet, and a Declaration of Conformity.
Attestations of Conformity to ATEX Directive 2014/34/EU (Potentially Explosive Atmospheres)
Available for hose assemblies for components used in Gas Zones 1 & 2 and Dust Zones 21 & 22, when applicable.
Material Certification to EN10204
Available for all the hose or hose assembly components.
Certificates of Conformity to EN ISO/IEC 17050
Are available for all products.
Fuel Hose Approval to SAE J1737
Bioflex Ultra hose samples have been tested and approved to SAE J1737 for Automotive Fuel Hose applications.
Each assembly is pressure tested to 2.0 times maximum working pressure before despatch, and pressure test certificates can be supplied.
Fire Resistance to BS5173 Section 103.13 Part 6.2 and 6.
BK Grade Bioflex Ultra hose assemblies are “Fire Resistant”. If DRC-300 is added at both ends, the assemblies are upgraded to “Fire Proof”.
Manufactured in compliance with Regulation (EC) No 1935/2004 - on materials and articles intended to come in to contact with food, Commission regulation (EU) No 10/2011 - relating to plastic materials and articles intended to come into contact with food and Regulation (EC) No 2023/2006 - on good manufacturing practice for materials and articles intended to come in to contact with food.
Special Usage Conditions
Cleaning & Sterilising Systems - CIP, SIP and Autoclave
CIP & SIP – PTFE liner tubes are chemically resistant to all CIP, SIP and Autoclave conditions. A primary consideration is whether the cleaning and purging cycle is likely to develop an electrostatic charge on the internal surface of the liner, in which case AS (Anti-Static) grade hose is required.
AS grade hose and Electrostatic charge generating systems are fully described in the hose liner section.
CIP systems using high electrical resistivity solvents like Toluene will require AS grade hose.
Another electrostatic generation problem arises when wet steam is passed through, or when the cleaning fluids or WFI are purged out of the line using nitrogen, compressed air or another gas, because droplets of liquid or water in the gas then generate a multi-phase condition until they are cleared out, which will generate a static charge, and so will require AS grade hose.
In static generating applications where AS grade hose is not acceptable due to the black PTFE liner, alternative solutions may be available – please contact us for advice.
Autoclave sterilisation does not normally involve any high flow rates through the hose bore, so static generation is not a problem. Aflex hose grades GP and AS, with SS braids are fully resistant to all autoclave conditions throughout the service life of the hose.
The rubber covered grades EPDM, (RC and BK) and Silicone Rubber (RC, SI) are able to withstand at least 300 x 30 minute autoclave cycles at relatively high autoclave temperatures (up to 135°C, 275°F). Please note that in robust applications covers may become more susceptible to tearing after extended autoclave cycles. Contact us for more specific information.
PTFE Hose-Use with Alkali Metals, Halogens and certain Halogens containing Chemicals
PTFE hose liners react chemically with Fluorine, Chlorine Trifluoride and molten Alkali Metals and so no hose grades are suitable for use with these chemicals.
When PTFE lined hose is used to carry Chlorine or Bromine, either as gasses or fluids, trace quantities can diffuse into and through the PTFE liner wall thickness. These will then combine with atmospheric moisture to corrode any SS, PB or RC outside the liner tube. It has been found that Corroflon SP, HB or KYB hose is best suited for these applications - Please consult the Corroflon brochure.
Depending upon the internal pressures and temperatures, some other gasses and fluids with a high halogen content may also be transmitted in trace quantities through the wall of the PTFE tube, including Hydrogen Fluoride, Hydrogen Chloride, Carbonyl Chloride (Phosgene), Carbon Tetrachloride and others. Please contact us for a suitable hose grade recommendation.
Other “Penetrating” Fluids and Gases
Sulphur Trioxide, Methyl Methacrylate, Caprolactam and Glacial Acetic Acid are some other chemicals which do not react chemically with the PTFE, but which can be absorbed and transmitted through the PTFE liner tube wall - please contact us for the optimum solution with these chemicals.
Generally, however, as a hydrophobic (non-wetting) material, PTFE is very resistant to the absorption of chemicals. In some cases, PTFE has superior resistance to diffusion, for example to the diffusion of automotive fuels, in comparison with all other plastics and rubbers.
There are some applications where fluids then gasses are passed through the hose, in a cyclic sequence.
This is normally associated with changes in temperature and/or pressure. For complex reasons these conditions are extremely damaging to the hose liner, whatever material it is made from.
For example, hoses are sometimes used to pass steam, water, steam etc into rubber moulding presses, in order to heat the mould, then rapidly cool it before reheating in the next cycle. Hoses of all types fail rapidly in such an application and PTFE lined hoses are no exception.
Please contact us for further information if these conditions apply.
Connecting Assemblies for Use in Applications
The lengths of hose assemblies and their configuration in use when connected into the application must always be in accordance with the Hose Configuration information at the end of this product literature.
When being connected for use in applications, the end fittings on hose assemblies must be connected to correct mating parts in the correct way, using the correct tools, spanners, clamps, nuts and bolts etc. The connections must be sufficiently tightened to ensure that the joint is leak free but not be over tightened as this can damage the sealing surfaces, especially with PTFE lined and flared end fittings.
In applications involving the transfer through the hose of expensive or dangerous fluids or gases, the hoses and connections must be pressure tested in situ before being put in to service. This should be done with some harmless media to 2.0 times the maximum working pressure of the hose assembly, as stated in the product literature.
If in doubt please contact us for advice.
Aflex Hose PTFE lined hose products are not rated as suitable for use in the following, special applications:
Silicone-Free Application requirements
Some applications, particularly paint manufacturing plants, and other specialized applications require that hoses do not include any silicone containing materials in their manufacture, or sometimes that hoses are guaranteed to be 100% Silicone Free. Customers or Distributors must specifically identify and define any such requirements in writing on all enquiries/orders.
Configure for Bend Radius
Hose Configuration Requirements
Hose Assemblies are usually connected at both ends in service. They may then either remain in a fixed, or static configuration or in a flexing, or dynamic configuration.
Whether static or dynamic, the First Rule concerning the configuration of the hose is that the bend radius of the hose must never be less than the Minimum Bend Radius (MBR) for the hose as listed in the relevant hose brochure.
The most common situation when this is likely to occur is when the hose is flexed at the end fitting, with stress being applied to the hose at an angle to the axis of the end fitting. Typically, this happens either because the length of the hose is too short, or because the weight of the hose plus contents creates a stress at an angle to the end fitting.
The Second Rule, therefore, if possible, is to design the configuration to ensure that any flexing in the hose takes place away from the end fittings.
Configure for Abrasion & Torque
The Third Rule is that the hose configuration should always be designed, and supported where necessary, to avoid any possibility of external abrasion.
In some cases, the length, configuration and angle of the hose can be designed to avoid abrasion. In others, static or moving support frames or support wheels are required.
The Fourth Rule is that the hose must not be subjected to torque, either during connection, or as a result of the flexing cycle.
Torque (twist) in the hose can be applied during connection if the hose is accidentally twisted, or if the second end being connected is a screwed connection, and the hose is subjected to torque during final tightening.
In a flexing application, if any flexing cycle of the hose occurs in 3 dimensions instead of 2, then torque will also occur:
EN16643 Hose Assembly Electrical Property Grades
The hose assembly electrical property grades and electrical resistance limits are defined within EN 16643 and tested in accordance with BS EN ISO 8031. Aflex Hose electrically conductive (EC) assemblies are defined in EN 16643 as electrically bonded and given the symbol M. M-grade assemblies exhibit a maximum electrical resistance of 100Ω between end fittings. Aflex Hose anti-static (AS) PTFE liners and rubber covers are termed static dissipative within EN 16643 and given the symbol Ω followed by letters that specify either the liner, cover or both; L=liner, C=cover, CL= cover & liner. Ω-grade covers or liners exhibit an electrical resistance of 103-108Ω.
The table below identifies each EN 16643 electrical grade for a hose assembly along with a brief description and example assembly configuration.
How to Order
The quantity, hose size, liner, braid, cover, protection system, length and fittings must be selected and specified in full.
EITHER by a full, written description. The hose grade can be specified by the code initials e.g. “Bioflex Ultra AS, SS, RC, DRC-300” defines an antistatic PTFE lined hose with an EPDM rubber cover over a SS braid, with a double rubber cover at both ends. The quantity, length and fittings can then be written in - e.g. “4 off x 1” bore Bioflex Ultra, AS, SS, RC, DRC-300 hose x 3.00 meters long. Both ends non-lined ANSI 150# S/S Flanges”.
OR by Part Numbers. Example from above “4 off Part No. 16-BFXU/AS-RC-00-3.00m-12-12, with DRC 300 at both ends”.
Any special requirements relating to the hose construction, or information required on Tags, or Certificates, or special testing of requirements, must be specified in full on the enquiry or purchase order.
Selecting the Hose Grade
There are two types of PTFE liner available, natural (GP) and antistatic (AS) and two types of braid; Grade 316 stainless steel (SS) and polypropylene (PB). Rubber covering and other external protection systems are also available.
A hose grade is specified by using the abbreviations given. For example, Bioflex Ultra AS,PB would describe a hose with an antistatic PTFE liner and a polypropylene braid. Selecting the End Fittings
Bioflex Ultra is available with a range of ‘standard’ end fittings, normally supplied hygienically PTFE lined and flared.
Stainless Steel End Fitting Materials
The equivalent specification for the different Grades of Stainless Steel are listed below:
Specification Equivalents List
To special order, end fitting components can be made in nonstandard grades of SS such as 1.4435, or other materials such as Hastelloy or Monel.
Conditions of Sale
Bioflex Ultra hose and hose assemblies are only supplied on the basis that the customer has read and accepted the Conditions of Sale. Customers own Conditions of Sale (or equivalent) are not accepted unless an acceptance, signed by a Director of Aflex Hose is supplied.
Selecting the Hose Length
Bioflex Ultra hose assemblies are made up to the specific lengths required. The hose length is taken as the length from the sealing face at one end of the hose to the same at the other end. The length tolerance is normally +2% / -0%. Closer tolerances are available to special order. (see also Length Calculation)
Bioflex Ultra Hose Assembly Length Limitations*
*Listed minimum lengths are for the Bioflex Ultra Hose only, and DO NOT INCLUDE THE LENGTHS OF THE FITTINGS AT EACH END. These must be found from the end fitting pages and added to calculate the minimum length of the hose assembly.**Longer lengths may be available to special order.
If required, Bioflex Ultra Assembly can be defined by an individual Part Number, made up of 7 entries as below:
*Note - If one of the rubber end protection systems is required, for one or both ends, please define the requirement in writing in addition to Part Number.
6 & 7
For Flange only: Add ‘/ZP’ for Carbon Steel Zinc Plated, or add ‘/EC’ for Epoxy coated
For all types of Elbow fittings add ‘/90°’ for 90° elbows
For ‘Hot Formed’ PTFE Lined Triclamps add ‘/HF’
Any additional requirements which are not included in the Part Number must be written out in full in the Order, including any special labeling or color coding.
- When purchasing Triclovers/Sanitary Fittings please specify the surface finish required
End (1) - a 3/4” ANSI 150# Swivel Flange, PTFE Lined
End (2) - a Cam and Groove Swiveling Female, PTFE Lined
and a Length of - 4ft 6 inches
Hose Assembly Part No. = 12 - BFXU/AS - RC - SG - 54in - 12L - 16L
Entry No. 1 2 3 4 5 6 7
Calculating the Hose Length
The formula for calculating the bent section of the hose length around a radius is derived from the basic formula that the circumference of a circle = 2πR, where R = the radius of the circle, and π = a constant, = 3.142.
So, if the hose goes around a 90˚ bend, which is 1/4 of a full circumference, and the radius of the bend is R, then the length of the hose around the bend is = 1/4 x 2πR. Or half way round, in a U-shape, = 1/2 x 2πR.
Note: In calculating the length of a hose assembly, the (non-flexible) length of the end fittings must be added in, also the length of any straight sections of hose, as in the following example:
To calculate the length for a 2” bore size hose with flange end fittings, to be fitted in a 90˚ configuration with one leg 400mm long, the other 600mm long.
Length of Bent Section (yellow) = 1/4 x 2πR (334) = 1/4 x 2 x 3.142 x 334 = 525mm
Length of top, Straight Section, including the top end fitting length = 600 - 334 = 266mm
Length of bottom end fitting = 66mm
Total length of Hose Assembly = 525 + 266 + 66 = 857mm
Things to consider
If in doubt, contact us.