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Drainage material types and specification

In the 1990 of the 20th century, most of our buildings are used in galvanized pipes, now gas, heating pipes and galvanized pipe. Galvanized steel tube cold plated pipe, hot-dip galvanized pipe, cold developed 7 "started the development of new pipe, and cold galvanized pipe is disabled. Four ministries such as the Ministry of construction, China has issued clear since 2000 disabled cold galvanized pipe. Now cold water pipes of the new community is rarely make cold galvanized pipe, some quarters of the hot water pipes using galvanized pipe.
Cold galvanized coating is not rust-coated, hot-dipped galvanized pipe coating both inside and outside, so allow, ' which has been disabled, who also advocated by the State, do not confuse!
Now community has many on using cast iron tube and the plating zinc tube ills of claims, actually big can without heart, this more of is other type pipe businesses of marketing means, because aluminum plastic tube, PP a k, not denied it by brings pipe aspects of innovation, theory using life is said to have is long, but if you watch observation about, general high-end real estate from water competent to sets within by cloth upper and lower pipes no a exception, are is design installation has cast iron tube and the hot plating zinc tube. Now, of course, cast iron pipe replacement, no matter is performance or appearance has greatly improved.
Also, from the water company came to your House and at least several kilometers is almost 11 kilometers, Chongqing great decorated with all kinds of diameter cast iron pipes and galvanized pipe, what to put on in their aluminum-plastic tube, IT h is there can not solve the problem.
(1) water:
The past, cast iron pipes are mainly used for water pipes. Outdoor sand mold cast iron pipe for main, room j-day is galvanized iron pipe, can be divided into the cold ()-galvanizing and hot-dip galvanizing in two ways. China has stipulated 200 () starting June 1 eliminating sand casting fittings and cold galvanized iron pipe. States also provide various drinking j "water pipe pipe and fittings, must have the approval of the health sector, may be sold.
Currently use channels mainly include three kinds of metal tubes, such as plastic-lined in hot-dip galvanized cast iron pipes, steel pipes, stainless steel pipes, and so on. II-plastic complex pipe, such as plastic compound steel pipe, aluminum-plastic composite pipe. ③ plastic pipe, such as cross-linked high density polypropylene NET engineering plastics.
(2) drainage pipes:
Pipes commonly used in polyvinyl chloride (PVC) pipes and cast iron pipe. Polyvinyl chloride (PVC) pipe in appearance but relatively noisy cast iron tubes and bulky and not very beautiful, the service life is polyvinyl chloride (PVC) pipe for the short, but accessory application., to meet different application requirements.
(3) plug: also known as bulkhead pipe packed material used to close the outlet. When mounted faucet off.
(4) mixing valve:
Mixing valve is a valve, mixing hot and cold water. Wood of the valve body is not actually mixed, just pick up the cold and hot water pipes, and plays a mix of j month.
2. pipe-specification
Pipe specifications before a number indicates the diameter. The latter figure f; thickness of material. For example, (D25x2.8 (+0.5), 125 X3.5 (+0.6), the former is the cold water pipe, the latter for the hot water pipe. BACK