Material Specification Reference


Last Updated: Mar. 09, 2018

Please begin by referencing this Chemical Compatibility Database. It is a general reference guide for establishing compatibility between fitting materials and various chemicals.
Note: The guide is for reference only – we strongly recommend testing to a standard that takes into account the actual chemical concentrations and environmental conditions specific to your application. Please also review the disclaimer at the bottom of the page.

Black Nylon (BN)

  • Temperature Range: -50 °F to 275 °F (135 °C)
  • Pressure: 150 psi @ 70 °F
  • Made from 6/6 nylon - exhibits strength, moderate stiffness, high service temperature, high impact resistance and tensile strength.
  • Resistant to fuels, lubricants and many chemicals, but vulnerable to attack by phenols, strong acids and oxidizing agents.
  • Used in fuel line, vacuum systems and general purpose applications: automotive industry approvals.



Glass Fiber Black Nylon (GFBN)

  • Temperature Range: -50 °F to 275 °F (135 °C)
  • Pressure: 150 psi @ 70 °F
  • Heat Deflection Temperature – ASTM D64: 475 °F (246 °C) @ 264 psi
  • Enhanced impact resistance results from inclusion of uniformly dispersed glass fibers that add strength to the resin.
  • Resistant to fuels, lubricants and many chemicals, but vulnerable to attack by phenols, strong acids and oxidizing agents.
  • Used in fuel line, vacuum systems and general purpose applications: automotive industry approvals.



Gray Kynar® (PVDF)

  • Temperature Range: -80 °F to 226 °F (107 °C)
  • Pressure: 260 psi @ 70 °F*
  • PVDF material can be autoclaved to 285 °F (140 °C)
  • Chemically resistant to: most acids, salts, weak bases, halogenated solvents, alcohols, nuclear and UV radiation, oxidants, ozone and deionized water.
  • Excellent rating for Ozone applications.
  • Polyvinylidene fluoride (PVDF) fittings contain recycled runner material produced during virgin material, Natural Kynar® production runs

*Applies to molded one-piece fittings.



High Density Polyethylene (HDPE)

  • Temperature Range: -148 °F (-100 °C) to 248 °F (120 °C)
  • Excellent resistance (no attack) to dilute and concentrated Acids, Alcohols and Bases.
  • Good resistance (minor attack) to Aldehydes, Esters, Aliphatic and Aromatic Hydrocarbons, Ketones and Mineral and Vegetable Oils.
  • Limited resistance (moderate attack and suitable for short term use only) to Halogenated Hydrocarbons and Oxidizing Agents.
  • Poor resistance to UV.
  • Complies with FDA 21 CFR 177.1520 when used unmodified for the manufacture of food contact articles.
  • It has excellent resistance to chemicals, but exhibits lower thermal resistance than other materials.
  • It is a softer material than nylon or polypropylene and much softer than Kynar®.



Medical Nylon (MN)

  • Temperature Range: -40 °F to 210 °F (99 °C)
  • Pressure: 150 psi @ 70 °F
  • Exhibits strength, moderate stiffness, high impact resistance and tensile strength.
  • Resistant to fuels, lubricants and many chemicals, but vulnerable to attack by phenols, strong acids and oxidizing agents.
  • Made from the same resin as Natural Nylon, with an FDA-compliant white colorant added.
  • Considered to be food-grade nylon (same as Natural Nylon).



Natural Kynar® (NK) or (K)

  • Temperature Range: -80 °F to 226 °F (107 °C)
  • Pressure: 260 psi @ 70 °F*
  • NK material can be autoclaved to 285 °F (140 °C)
  • Chemically resistant to: most acids, salts, weak bases, halogenated solvents, alcohols, nuclear and UV radiation, oxidants, ozone and deionized water.
  • Excellent rating for Ozone applications.
  • Animal Derivative Free
  • Meets USP Class VI requirements
  • Natural Kynar is virgin Polyvinylidene fluoride (PVDF)

*Applies to molded one-piece fittings.



Natural Nylon (NN)

  • Temperature Range: -40 °F to 210 °F (99 °C)
  • Pressure: 150 psi @ 70 °F
  • Exhibits strength, moderate stiffness, high impact resistance and tensile strength.
  • Resistant to fuels, lubricants and many chemicals, but vulnerable to attack by phenols, strong acids and oxidizing agents.
  • Food-grade: FDA, USDA, NSF and 3A-DAIRY compliant.



Natural Polypropylene (PP)

  • Temperature Range: -9 °F to 150 °F (66 °C)
  • Pressure: 125 psi @ 70 °F
  • Meets FDA requirements 21 CFR 177.1520(a)(3)(i) and (c)3.1a.
  • Radiation stable and is resistant to solvents, chemicals, water and other inorganic environments.
  • Resists most strong mineral acids and bases; however, it is subject to attack by oxidizing agents.
  • Animal Derivative Free
  • USP Class VI material



Nitrile Rubber (Buna-N) (NBR) (NBRW)

  • Temperature Range: -40 °F (-40 °C) to 257 °F (125 °C)
  • Excellent resistance to petroleum-based oils and fuels, silicone greases, hydraulic fluids, water and alcohols.
  • Commonly used in applications involving automotive fuels and lubricants, and oil resistant applications of all types.
  • Low compression set, high tensile strength, and high abrasion resistance



Polycarbonate (PC)

  • Temperature Range: -211 °F (-135 °C) to 250 °F (121 °C)
  • Autoclavable
  • UV Resistance: Good
  • Excellent resistance (no attack) to dilute acids and mineral oils.
  • Good resistance (minor attack) to Alcohols and vegetable oils.
  • Limited resistance (moderate attack and suitable for short term use only) to Aldehydes.
  • Poor resistance (not recommended for use) with Concentrated Acids, Bases, Esters, Aliphatic Hydrocarbons, Aromatic Hydrocarbons, Halogenated Hydrocarbons, Ketones and Oxidizing Agents.



Silicone (S) (RSW)

  • Temperature Range: -65 °F (-53 °C) to 400 °F (204 °C)
  • Autoclavable
  • Food Grade
  • Excellent weathering properties and handles both hot and cold temperature extremes
  • Chemically resists oxidizing chemicals, ozone, concentrated sodium hydroxide, potassium carbonate.
  • Fair performance when exposed to acids, some solvents, and alkalis; potassium hydroxide.
  • Poor resistance to Oils, most Solvents, Fuels, Ketones, Acetone, and Hydrocarbons.
  • Odorless and Tasteless.
  • Commonly used in applications involving vacuum routing, agriculture, biomedical, and food processing.



Viton® (V)

  • Temperature Range: -20 °F to 400 °F (205 °C)
  • Diaphragm Max Pressure: 2000 psi
  • Viton® material can be autoclaved.
  • Chemically resistant to: Hydrocarbons, Many Aggressive Chemicals, Diluted Acids, Weak Alkalis, Mineral Oils, Aliphatic and Aromatic Hydrocarbons, Chlorinated, UV, and Ozone.
  • Excellent rating for Ozone applications.
  • Poor resistance to Ketones and Acetone.
  • Commonly used in applications involving Hot Water, Acid, Alkali, Oils, Hydrocarbon, Salts Solutions.



White Nylon (WN)

  • Temperature Range: -50 °F to 275 °F (135 °C)
  • Pressure: 125 psi @ 70 °F
  • Made from 6/6 nylon - exhibits good tensile strength, moderate stiffness, high impact resistance and tensile strength.
  • Resistant to fuels, lubricants and many chemicals, but vulnerable to attack by phenols, strong acids and oxidizing agents.
  • Used in fuel line, vacuum systems and general purpose applications: automotive industry approvals.
  • Contains recycled runner material produced during virgin material (Natural Nylon) production runs.



White Polypropylene (WP)

  • Temperature Range: -9 °F to 150 °F (66 °C)
  • Pressure: 125 psi @ 70 °F
  • Contain recycled runner material produced during virgin material (Natural Polypropylene) production runs.
  • Radiation stable and is resistant to solvents, chemicals, water and other inorganic environments.
  • Resists most strong mineral acids and bases; however, it is subject to attack by oxidizing agents.



Disclaimer: Data presented for properties of materials, pressure, temperature and chemical resistance is for reference only. Customer applications and conditions of use are beyond our control; therefore, it is imperative that customers test our products in their specific application to determine suitability. All information is provided without implied or expressed warranty or guarantee, and none of the information provided constitutes a recommendation or endorsement of any kind by KempCo Specialties.