Allowed electricity pipes in the building

One of the items which should be coordinated between owner and electricity supervisor is type and material of electricity pipe.

At the present time regarding clause 13-7-3-3-2 page 90 of subject 13 of building national system (last version 1395) using of Poly amid pipes or other plastic pipes which ignite and burn next to fire, is completely prohibited. But unfortunately still due to the low price of these pipes and similar pipes as Poly amid, Poly ethylene and corrugated, they are mostly interested.

While the consequences of pipe firing in the building is very high as they are built-in and causes high costs for residents. It’s better to pay more initial cost to principled implementation of electrical installations and compliance with standards including providing safety and think about the life and fund of ourselves and the other people in the future and also equipment.

In this line due to table 13-7-3-2 page 90 of subject 13 of engineering building national system, the allowed pipes are specified in which steel pipes and non-self-burning hard plastics (which is PVC) are allowed. It’s necessary to mention that certainly PVC electrical pipes should hold standard 11215-211 and strength to mechanical impact and pressure.

Off course corrugated pipes are just allowed to be used if their material is PVC and for building use and un-industrial and also built-in use. (using on wall is prohibited in any terms)

Due to the current situation maybe the engineers’ duty is convincing the constructors and owners for correct installation of these pipes to avoid unpleasant accidents. It’s better to written announce the owner about this matter at the beginning of building project.

Cold bend UPVC electric pipes

The best available pipes in the market due to quality and economic efficient are cold bend UPVC pipes. Using of these pipes has many advantages for which can indicate on high mechanical strength to pressure and out impact, resistance to corrosion, rusting, humidity and chemical materials, no use of elbow, high resistance at bending place (no brittleness comparing to hot bending UPVC pipes), insulation, transportation, installation, easier storage and lower cost (compared to steel pipes) and … .

Regarding the double price of hot bend PVC pipes and triple price of cold bend UPVC pipes, maybe we would witness the opposition of constructors. But for a small building which has 3-4 billions of cost at spring 1399, an extra cost of one million is not a significant amount.

Off course there are honest and capable constructors and owners who use the best type and brands of cold bend UPVC electric pipes themselves. Also clever constructors can sell their estate in higher price than its region because of using qualified and standard materials and not only don’t worry about lower profit, but also earn more benefits.

It’s hoped this opinion be involved between the sellers, executives and engineers to avoid selling and installing not allowed electric pipes such as ignitable polyamide and corrugate pipes just because of employer’s order and proposal and not only try to convince them but also in case of their insistence refuse to accept the job.

Because all of us are responsible to the life and fund of human and future.