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Ratings and Certifications According to the National Building Code, (NBC 3.1. 5.19), PVC DWV pipe and fittings to be used in non- combustible buildings (up to 18 metres) must have a flame-spread rating of 25 or less. NAPCO PVC DWV pipe and fittings are certified to ULC S102. 2 with a flame spread rating of 10.

What are the different grades of PVC pipe?

There are two common types of PVC pipe – schedule 40 PVC and schedule 80 PVC. Schedule 40 PVC is usually white in color and schedule 80 is usually a dark gray (they can also be found in other colors). Their most important difference, though, is in their design. Schedule 80 pipe is designed with a thicker wall.

Can PVC be fire rated?

PVC is inherently a self-extinguishing fire retardant material due to the abundance of chlorine in its formulation, with burning characteristics closer to that of paper, wood and straw. These materials have a very high risk of igniting and will maintain the fire.

What is the modulus of elasticity of PVC pipe?

4000 MPa
Elastic Modulus of PVC-O – 4000 MPa.

Is Schedule 40 PVC fire rated?

PVC Schedule 40 is approved to be used indoors. It can be used behind wall or on the surface of the wall (provided it’s not subject to physical damage). If it penetrates a fire wall, it has to be firestopped. PVC cannot be used in air handling plenums.

Can PVC be used in a plenum?

Fact: PVC should not be installed in a plenum. It is classified as a combustible material per ASTM E 136.

How fire resistant is PVC?

PVC in Fires PVC is resistent to ignition. The temperature required to ignite rigid PVC is more than 150 degrees celsius higher then that required to ignite wood. The ignition of common flexible PVC is lower, but with specialised formaulations, it may be significantly increased.

What happens if you burn PVC?

When burned PVC produces carbon monoxide, dioxins, and chlorinated furans. Dioxins and furans are two of the most toxic man-made products because the lowest amount of either product can cause diseases such as, cancer and birth defects.

How do you increase the strength of PVC pipe?

One of the best ways to make the PVC pipe stronger internally is to add spray foam. To do this, you will want to fill the interior of the pipe with spray foam. It works best to drill small holes throughout your pipe spaced about 1 foot apart. Use the holes to direct the spray foam into the pipe.

How do you increase PVC strength?

Its properties can be enhanced/modified by adding several additives, such as heat stabilizers, UV stabilizers, plasticizers, impact modifiers, fillers, flame retardants, pigments, etc.

What is the oxygen index of PVC?

Rigid PVC has an oxygen index of 45-50, compared to 21-22 for wood and 17-18 for most thermoplastics. Oxygen index values above 27 can easily be attained with flexible PVC. The significance of this is that most rigid and flexible PVC will not burn alone without the application of heat from another source.

What are the fire performance properties of PVC?

Polyvinyl chloride (PVC, or vinyl) possesses excellent fire performance properties. All organic polymers (whether they are plastics or natural materials like wood, cotton or rubber) are combustible: when sufficient heat is supplied to any organic polymer, it will thermally decompose, and its thermal decomposition products will burn.

Who is the leading manufacturer of thermoplastic pipes?

As the leading full-line manufacturer of ABS, CPVC, and PVC piping systems for drainage and pressure applications, we welcome the opportunity to be the one-stop source for all your thermoplastic piping systems. Charlotte manufactures pipe and fittings to exacting tolerances.

What is the LOI value of PVC?

A material with a LOI value above 21 (air contains 21% oxygen) should not burn in air at room temperature, and a value above 25-27 means that the material will only burn under conditions of very high applied heat. Rigid PVC has an oxygen index of 45-50, compared to 21-22 for wood and 17-18 for most thermoplastics.