--- title: Altaflo® 451 HP PFA canonical: https://www.pexco.com/products/tubing/fluoropolymer-tubing/altaflo-451-hp-pfa-tubing/ --- [Fluoropolymer Tubing](https://www.pexco.com/products/tubing/fluoropolymer-tubing/) Altaflo® 451 HP PFA =================== Commonly chosen for applications involving extreme chemical resistance combined with high purity requirements. [Request More Information](#scroll-to-form) ![](https://www.pexco.com/wp-content/uploads/2025/10/altaflo-placeholder-1000x600.jpg) ALTAFLO 451 HP PFA (high purity perfluoroalkoxy) is commonly chosen for applications involving extreme chemical resistance combined with high purity requirements. Although HP PFA is available in a variety of resin grades, Altaflo 451 HP PFA tubing is made from a high molecular weight, high purity resin that provides excellent chemical resistance, highest purity levels (extractable data available upon request) and smooth surface finish. Features -------- - Exclusive use of Chemours 451 HP PFA resin - 100% Virgin High Performance Grade resin used to resist stress cracking - Chemically inert to nearly all industrial chemicals & solvents - High thermal stability - Low permeability - Translucent - Smooth surface finish resulting in less area of particle entrapment - Moisture absorption nearly zero - FDA compliant for food contact - Non-Flammable - Suitable for use with flare or conventional fittings - Also available in pipe, coiled hose and convoluted constructions Applications ------------ - Semiconductor - Chemical process - Heat Exchangers - Laboratory applications - Flow Monitoring - Pharmaceutical --- Specifications -------------- #### General Meets or exceeds the requirements listed in ASTM D 3307 Type II --- #### Temperature -320°F to 500°F --- #### Flammability Resin is UL 94 V0 rated. HP PFA resists combustion and does not promote flame spread #### FDA 451 HP PFA resin is compliant with FDA regulation 21 CFR 177.1550, permitting its use in food contact applications --- #### SEMI Meets or exceeds requirements of SEMI F57, F104, and C90 ### Tubing Dimensions+ ### Standard+ Part NumberIDODID +/-WallWall +/-451-0125-030-0C1/161/8.0040.030.003451-0250-030-0C3/161/4.0040.030.003451-0250-040-0C.1701/4.0040.040.003451-0250-047-0C.1561/4.0040.047.003451-0250-062-0C1/81/4.0050.062.003451-0375-062-0C1/43/8.0050.062.003451-0500-062-0C3/81/2.0050.062.003451-0750-062-0C5/83/4.0050.062.003451-1000-062-0C7/81.0050.062.003451-1250-075-0C1.1001.250.0080.075.005451-1500-093-0C1.3141.500.0150.093.008 ### Metric+ Part NumberIDODID +/-WallWall +/-451-0157-040-0C.078 (2mm).157 (4mm).0050.040 (1mm).003451-0236-040-0C.157 (4mm).236 (6mm).0050.040 (1mm).003451-0315-040-0C.236 (6mm).315 (8mm).0050.040 (1mm).003451-0394-040-0C.315 (8mm).394 (10mm).0050.040 (1mm).003451-0472-040-0C.394 (10mm).472 (12mm).0050.040 (1mm).003 Additional sizes up to 4” OD available upon request. Please contact Altaflo office for details. Available in natural color only. For pigmented items, see Altaflo 400 Series. ### Schedule 40 Pipe Dimensions+ Part NumberNominal SizeActual ODWallStock Length451-0540-088-0C1/4".540" ± .010.088" +.020,-010ft451-0840-109-0C1/2".840" ± .010.109" +.020,-010ft451-1050-113-0C3/4"1.050" ± .015.113" +.020,-010ft451-1315-133-0C1"1.315" ± .015.133" +.020,-010ft451-1660-140-0C1-1/4"1.660" ± .015.140" +.020,-010ft451-1900-145-0C1-1/2"1.900" ± .015.145" +.020,-010ft451-2375-154-0C2"2.375" ± .020.154" +.020,-010ftAltaflo maintains inventory of Schedule 40 Pipe in our 451 HP PFA Series. Schedule 40 Pipe is also available as a Custom Order in Altafluor 200, 400 & 480 Series resins. ### Bend Radius & Working Pressure+ ### Standard+ Part NumberODWallIDBend RadiusWorking Pressure @ 73°F451-0125-030-0C0.1250.0300.0621/2"451451-0250-030-0C0.2500.0300.1881"226451-0250-040-0C0.2500.0400.1701"301451-0250-047-0C0.2500.0470.1573/4"353451-0250-062-0C0.2500.0620.1251/2"466451-0375-062-0C0.3750.0620.2501"311451-0500-062-0C0.5000.0620.3752"233451-0750-062-0C0.7500.0620.6256"155451-1000-062-0C1.0000.0620.87522"117451-1250-075-0C1.2500.0751.10025"75451-1500-093-0C1.5000.0931.31425"105 ### Metric+ Part NumberODWallIDBend RadiusWorking Pressure @ 73°F451-0157-040-0C0.157 (4mm)0.040 (1mm)0.079 (2mm)1"468451-0236-040-0C0.236 (6mm)0.040 (1mm)0.157 (4mm)1-3/4"313451-0315-040-0C0.315 (8mm)0.040 (1mm)0.236 (6mm)2-1/2"235451-0394-040-0C0.394 (10mm)0.040 (1mm)0.315 (8mm)2-3/4"188451-0472-040-0C0.472 (12mm)0.040 (1mm)0.394 (10mm)4"156 The above information is based on tests performed at 73° F and can vary in individual applications based on parameters such as temperature, chemical concentration, pressure, etc. Please consult factory for details. For an estimate on burst pressure at ambient temperature we consider a 3:1 ratio when exposure temperature is 73° F. However Altaflo does not recommend exceeding the suggested Working Pressure listed. Additional sizes up to 2” are available. Available in natural color only. For pigmented items, see Altaflo 400 Series. ### Physical Properties+ Physical PropertyASTM Test MethodUnitsValuesUpper Service Temp.500° FSpecific GravityD 7922.15Tensile StrengthD 1708PSI4500ElongationD 638%400Flex ModulusD 790PSI90,000MIT Flex LifeD 2176500,000HardnessD 2240Shore D60The above information is based on tests performed at 73° F and can vary in individual applications based on parameters such as temperature, chemical concentration, pressure, etc. Please consult factory for details. NOTE: The values represented above are based on the use of 100% virgin grade high performance - low melt flow PFA resin as used in the production of Altaflo 451 Series Tubing. When comparing data it is critical that performance values are listed for the grade of resin used. ### Coiled Hose+ ![](https://www.pexco.com/wp-content/uploads/2026/07/altaflo-452-coiled-hose-1024x269.png) ### Standard Convoluted Construction+ Part NumberNominal OD SizeID MinID MaxOD MaxNominal WallConvolutions Per Inch45C-0375-020-0C\*3/80.2510.2750.3750.020645C-0500-023-0C\*1/20.3640.3750.5000.023645C-0625-025-0C\*5/80.4850.5000.6250.0255.545C-0750-025-0C\*3/40.6080.6250.7500.025545C-0875-025-0C\*7/80.7300.7500.8750.025445C-1000-025-0C\*10.8600.8751.0000.0253.5\*Custom item — please consult factory for lead time and minimum order requirements. Available in natural color only. For pigmented items, see Altaflo 400 Series. ### Ultra Flex Convoluted Construction+ Part NumberNominal OD SizeID MinID MaxOD MaxNominal WallConvolutions Per Inch45U-0375-020-0C\*3/80.2510.2750.3750.020945U-0500-023-0C\*1/20.3640.3750.5000.023945U-0625-025-0C\*5/80.4850.5000.6250.025945U-0750-025-0C\*3/40.6080.6250.7500.025845U-0875-025-0C\*7/80.7300.7500.8750.025845U-1000-025-0C\*10.8600.8751.0000.0258\*Custom item — please consult factory for lead time and minimum order requirements. Available in natural color only. For pigmented items, see Altaflo 400 Series. Resources and Downloads ----------------------- [View Resource Library](https://www.pexco.com/resources/) - [![PDF Icon](https://www.pexco.com/wp-content/themes/pexco-2026/assets/images/resource-icon-pdf.svg) #### Altaflo® 451 HP PFA Technical Specifications View Document ](https://www.pexco.com/wp-content/uploads/2026/07/25-Pexco-altaflo-451-HP-PFA-TechSheet_10-15.pdf) - [![PDF Icon](https://www.pexco.com/wp-content/themes/pexco-2026/assets/images/resource-icon-pdf.svg) #### Altaflo Fluoropolymer Tubing Catalog View Document ](https://www.pexco.com/wp-content/uploads/2025/09/Pexco-Altaflo-Fluoropolymer-Tubing-and-Pipe_productcatalog_Apr2026-OUTPUT.pdf) - [![PDF Icon](https://www.pexco.com/wp-content/themes/pexco-2026/assets/images/resource-icon-pdf.svg) #### Altaflo Coiled Hose Order Form View Document ](https://www.pexco.com/wp-content/uploads/2025/09/Altaflo-Coiled-Hose-Order-Form.pdf) - [![PDF Icon](https://www.pexco.com/wp-content/themes/pexco-2026/assets/images/resource-icon-pdf.svg) #### Altaflo Order Form View Document ](https://www.pexco.com/wp-content/uploads/2025/09/altaflo-orderinginfo-v1.pdf) Related Product and Capabilities -------------------------------- [![](https://www.pexco.com/wp-content/themes/pexco-2026/assets/images/product-image-placeholder.png)![Altaflo® 100 PTFE Tubing](https://www.pexco.com/wp-content/uploads/2025/10/altaflo-placeholder-1000x600.jpg) ### Altaflo® 100 PTFE Tubing Altaflo® 100 PTFE tubing has the broadest temperature range of any fluoropolymer and can resist highly corrosive liquids and gases even at elevated temperatures. 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