Material of chlorine main pipe
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This post was last edited by sunjl1981 on 2013-1-6 23:35. Is it feasible to use UPVC/FRP pipes for chlorine main pipes? # + + .
I’m not sure about the specific type of fiberglass used in our factory
Titanium materials for indoor use, composite pipes for outdoor use
No problem; just be careful that dry chlorine does not require titanium tubes.
Reply 1# luaf: Our company uses UPVC/FRP pipes for the main pipelines carrying alkali and chlorine gas, all the way to the chlorohydrin workshop； Titanium pipes for use in ion-exchange membrane caustic chambers, and composite pipes for outdoor use.
From a temperature perspective, it seems that PVC pipes cannot be used for the main pipes at the outlet of electrolysis cells; however, since the chlorine gas in these cells is generally under positive pressure, they can be used just fine after being reinforced with FRP. Pay attention to the effect of the coefficient of expansion on the weld. From a safety perspective: CPVC or titanium pipes are preferred in front of the large valve. Considering only the reliability aspect
Reply to 4# Mengyuan: High temperatures cause easy aging; reinforcement with fiberglass improves its mechanical properties. It can make up for the shortcomings of UPVC.
Our company uses PVC/FRP materials; UPVC pipes have poor heat resistance, and their tensile strength decreases at temperatures above 60°C (they are suitable for domestic wastewater with a continuous discharge temperature not exceeding 40°C and an instantaneous discharge temperature not exceeding 80°C).
UPVC material is rigid polyvinyl chloride that contains no plasticizers or additives, and is often used in water supply and drainage pipelines due to its non-toxic and odorless properties. However, it has higher hardness, and its temperature resistance is inferior to that of PVC and CPVC. For industrial applications, such as those involving wet chlorine pipelines as mentioned by the original poster, it is not recommended to use UPVC material. If money permits, CPVC, which is chlorinated polyvinyl chloride, can be chosen; this material offers better temperature resistance. The chlorine main pipe can entirely be made of composite materials such as PVC/FRP and CPVC/FRP. Given the difficulty of installation, people generally use titanium tubes before the control valve on the chlorine main pipe, and composite materials afterward.
Agreed! It’s just that the composite tube has only a thin layer of titanium plate on it; therefore, it is recommended to use pure titanium tubes! QQ: 798346317 TEL: 15091202431
It doesn’t matter to use a composite material or a titanium tube before drying, but titanium tubes cannot be used after drying, as that would be very dangerous – dried chlorine will react violently with it, potentially even leading to an explosion