Fire retardant jacket for tubing
A tubing assembly including a conductive corrugated tubing including convolutions of peaks and valleys and a polymer jacket disposed along a length of said corrugated tubing, the polymer jacket including a fire retardant.
1. A tubing assembly comprising:
conductive, metal corrugated tubing including convolutions of peaks and valleys;
a conductive polymer jacket disposed along a length of said corrugated tubing, said conductive polymer jacket forming a conductive path from the jacket to the corrugated tubing;
the conductive polymer jacket has a volume resistively sufficient conduct charge from an outer surface of the polymer jacket through the conductive polymer jacket to the conductive, metal corrugated tubing;
the conductive polymer jacket including a fire retardant;
wherein the polymer jacket has a minimum tensile strength of about 1500 psi, a minimum elongation of about 200%, and a minimum flexural modulus of about 50,000.
2. The tubing assembly of claim 1 wherein:
said fire retardant is present in an amount sufficient for the tubing assembly to pass UL723/ASTM E84 testing for >50 smoke density and >25 flame spread and rated for 1, 2, and 4 hour UL Through Penetration Firestop System Classifications.
3. The tubing assembly of claim 1 wherein:
said fire retardant is nitrogen/phosphorus type present in the polymer jacket in about 40% to about 60% by weight.
4. The tubing assembly of claim 1 wherein:
said fire retardant is brominated type present in the polymer jacket in about 10% to about 20% by weight.
5. The tubing assembly of claim 1 wherein:
said fire retardant is chlorinated type present in the polymer jacket in about 30% to about 50% by weight.
6. The tubing assembly of claim 1 wherein:
said fire retardant is magnesium hydroxide type present in the polymer jacket in about 40% to about 60% by weight.
7. The tubing assembly of claim 1 wherein:
said fire retardant is aluminum trihydrate type present in the polymer jacket in about 40% to about 60% by weight.
8. The tubing assembly of claim 1 wherein:
said corrugated tubing is annular.
9. The tubing assembly of claim 1 wherein:
said corrugated tubing is helical.
10. The tubing assembly of claim 1 further comprising:
a fitting coupled to said corrugated tubing at an end thereof.
11. A tubing assembly comprising:
conductive, metal corrugated tubing for transporting fluids under pressure, the tubing including convolutions of peaks and valleys;
a conductive polymer jacket disposed along a length of said corrugated tubing, the conductive polymer jacket forming a conductive path from the jacket to the corrugated tubing;
wherein the polymer jacket has a minimum tensile strength of about 4000 psi, a minimum elongation of about 300%, a minimum flexural modulus of about 25,000 psi and a maximum volume resistivity of about 7×10^4 ohm-cm.