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Corroflon PTFE Hose

Corroflon PTFE Hose Specification

Corroflon was launched in 1978 and, since then has been continually updated and improved. Now it is the industry-standard convoluted flexible PTFE hose for major chemical, pharmaceutical and food companies worldwide.

The key to Corroflons success lies in its design and build quality, which guarantees a long, safe and reliable service life. Corroflon’s design differs from every other convoluted PTFE hose on the market, which results in distinctive and measurable performance and safety advantages.

Purpose – Corroflon GP,SS is the general purpose grade of hose and has been carefully designed to satisfy the widest range of application requirements.

Design & Approvals – The hose liner is manufactured from hose quality grade PTFE conforming to FDA requirements 21 CFR 177.1550, extruded into tube and helically convoluted. It also includes a heavy gauge Grade 304 stainless steel reinforcing wire helically wound into the external root of the convolutions to strengthen the convoluted shape. The braid is high tensile grade 304 stainless steel wire braid to give maximum protection to the hose against internal pressure and external abrasion.

Corroflon GP hose liner tube also complies with:

USP Class 6:

  • Systemic Injection Test
  • Intracutaneous Test
  • Intramuscular Test
  • USP L929 MEM Elution Test (Cytotoxicity)

Temperature vs Pressure – The graph below gives maximum pressure for each size of Corroflon GP,SS hose. At temperatures less than 0°C, the listed maximum working pressures apply, down to -70°C.

Temperature vs Vacuum – All sizes of Corroflon GP,SS up to 2″ bore are usable at full vacuum up too 130°C. At higher temperatures, the vacuum resistance should be reduced 1% for every degree above 130°C. For sizes above 2″ bore, the vacuum resistance depends on the bend radius used. In general, for sizes above 2″ when high/full vacuum resistance is required, use SP grade.

Corroflon Hose – Flow Rate Calculation – If it is required to determine the flow rate of a particular hose assembly, or if it is required to determine the pressure required to generate a certain flow rate, then this can sometimes be approximately calculated by the (Corroflon) supplier.

It should be noted that calculations can only be made for fluids with a viscosity like water and for hose assemblies with PTFE lined end fittings (no bore restrictions at the ends of the hose).

The following information should be given to the supplier, to calculate the Flow Rate in Cubic Metres per Hour:

  • Pressure in Bars at the Entry into the Hose Assembly
  • Pressure in Bars at the Exit from the Hose Assembly
  • The hose configuration (roughly straight, 33%, 66% bends or 100% Tightly Coiled)
  • To calculate the pressure drop in bars over the length of the hose assembly:
  • Required Flow rate in cubic metres per hour
  • The hose configuration (roughly straight, 33%, 66% bends or 100% Tightly Coiled).

Maximum Operating Temperatures (internal fluid)

  • SS Braid -70°C to +230°C, PB Braid -30° to +100°C
  • SS,RC and SS,FP -40°C to +140°C,
  • SS,SI -40°C to +180°C,
  • KYB -40°C to +120°C

(For external temperature limits, reduce maximum temperature by 20°C)

PRESSURE VARIATION WITH TEMPERATURE

SS Braid as per Graph on previous page; PB pressure as listed from -30°C to +80°C then reducing 5% per °C up to a maximum temperature of 100°C.

RC,FP,SI grades as per graph on previous page, BUT only within the temperature range for the particular grade of rubber.

*MWP The Maximum Working Pressure of a hose assembly is limited to the lowest of the MWP’s of either of the two end fittings, as given for each end fitting design on the relevant page or of the hose itself as listed.