Co-Extruded Hytrel-Lined PVC Tubing | TBL Plastics

Envir-A-Line™ XX | Co-Extruded Tubing

Photo Opaque PVC with Inert Hytrel® Liner

Envir-A-Line™ XX is commonly used for many gases and hydrocarbons. has a unique co-extruded construction, incorporating a highly inert Hytrel® inner-liner that exhibits excellent dielectric properties and provides a superior gas and moisture barrier. Its moisture permeability is similar to poly-ether based urethanes. The product’s outer shell is comprised of a permeable photo-opaque black PVC, so the product can be repeatedly autoclaved without the two materials separating.

Used widely in the welding industry because of its superior barrier and dielectric characteristics, Hytrel® contains no plasticizers and does not outgas. The consistant quality and performance of Envir-A-Line™ XX is due partly to the industry leading thickness of our Hytrel® inner-liner thickness. Envir-A-Line is also commonly used in the beverage industry. It is FDA approved and compliant with NSF51 standards for potable water. *Also available with photo opaque hygienic white outer shell, high pressure outer braiding for higher pressures.

Sizing Chart

P/N ID OD Wall Std. Length
HPVC-125X220 1/8″ .220″ .048″ 100′ 500′ 1000′
HPVC-170X250 .170″ 1/4” .04″ 100′ 500 1000′
HPVC-170X314 .170″ .314″ .072″ 100′ 500′ 1000′
HPVC-187X275 3/16″ .275″ .044″ 100′ 500′ 1000′
HPVC-250X375 1/4″ 3/8″ 1/16″ 100′ 500′
HPVC-250437 1/4″ 7/16″ 3/32″ 100′ 500
HPVC-280X468 .280″ 15/32″ 3/32″ 100′ 500′
HPVC-375X500 3/8″ 1/2″ 1/16″ 100′ 500′
HPVC-500X625 1/2″ 5/8″ 1/16″ 100′ 500′
HPVC-500X687 1/2″ 11/16″ .093″ 100′ 500′
HPVC-500X750 1/2″ 3/4″ 1/16″ 100′ 500′

Physical Properties

Mechanical Properties English SI Test Method
Shore Hardness, 10 sec delay 66 A 66 A ASTM D2240
Specific Gravity 0.890 0.890 ASTM D792, 23/23°C
Tensile Strength (Break) 1900 psi 13100 kPa ASTM D412-Die C, 2hrs,23°C
Elongation at Break 630% 630% ASTM D412-Die C, 2hrs,23°C
Tensile Stress (300% Strain) 700 psi 4800 kPa ASTM D412-Die C, 2hrs,23°C

Burst Pressure

150 Psig


Coolant Fluids
Dental Air/ Vaccum


High purity
Low moisture permeability
Extremely flexible
Abrasion resistant shell


Continuous spools 1000ft.
Pre-cut lengths
Fabricated hose connections

Temperature Rating

Inner tube 190 °F/ Braid 250 °F


UL Listed
Traceability: lot and batch
Certification: lot and batch
Note: Material properties may be affected greatly by temperature, operating pressure, chemical concentration, the presence of other chemicals,
and other factors. Ultimately, users should determine the compatibility of any product through field testing under their particular process
conditions. Specifications are subject to change without notice.
Hytrel® is a registered trademark of DuPont Company.