1.Metal tube

(1) Galvanized pipe
(2) Galvanized pipe
(3) Stainless steel pipe

2. Plastic pipe

(1) UPVC pipe
In fact, it is a kind of plast習遠ic pipe, and the joint個熱s are usually glued togeth從熱er. UPVC pipes have poor f票視rost resistance and heat resista日可nce. Therefore, hot and cold wat理雨er pipes are rarely used. PVC pipe吃海s are suitable for electric wire pip醫北es and sewage pipes. 森空The scientific and technological子新 circles have discovered that the chem綠媽ical additive phthalate, wh車街ich can make PVC softer, has a grea學女t impact on the kidneys, liver, a制不nd testes in the human body and can 間影cause cancer. , Kidney damage, d海睡amage to the human bo站近dy's functional recon吃是struction system, and黃遠 affect development (o制少nly cold water is not good for hot w火大ater, and it is easy to 什刀be brittle in winter).

(2) PPR tube
As a new type of water pipe m草房aterial, it can be used as a近志 cold pipe or a hot water pipe. Becau哥爸se of its non-toxicity, light東男 weight, pressure resistance, an鐵林d corrosion resistance, it is becoming嗎得 a popular material. It is also 校睡suitable for hot water p理間ipes and even pure dri章得nking water pipes. The int這藍erface of the PPR pipe ad下高opts hot-melt technology, and 東有the pipes are completely我人 fused together, so once the installa拍通tion and pressure test pass, there劇文 will be no longer aging and wa和們ter leakage like alumi不黃num-plastic pipes, and the PP鐵可R pipe will not scale. The main defec下上ts of PPR water pipes a外裡re: high temperature re路河sistance, poor pressure res雪舊istance, long-term working temper又請ature can not exceed 70 ℃; la會體rge linear expansion coeffici花喝ent, the pipe is eas慢城y to deform after hot water,冷數 which affects the appearan鄉員ce; each length of straight pipe is 4分船 meters / Root, the coi匠舊l is 100 meters---300 meters. And 雨筆can not be constructed at a small an河但gle. If the pipeline is laid f司年or a long distance or there are 懂靜many corners (small a機玩ngles), a large number of jo子理ints will be used in the construction讀機; the pipes are cheap but th河機e price of the accessori哥術es is relatively high.

(3) PB tube
Polybutene (PB) resin was f畫秒irst synthesized by Italian 歌河professor G. Natta in 1954, and睡就 industrial production began in 1964. I短那n 1965, the first polybu呢高tene (PB) heating piping system ap火外peared in the Austrian Plastic房男s Association, which is exciting. T時他he thing is, the system is still run場玩ning today. In the followin聽藍g 50 years, the application of polybut亮但ene (PB) piping system has been cont有錯inuously promoted, and it 小她is applied to the radiator heating conn見雜ection piping system in the樂鐘 building, the ground radi能筆ant heating system and the domestic co兵路ld and hot water piping system放飛. Polybutene (PB) re麗是sin is a high-molecular 看短polymer composed of carbon an務志d hydrogen. Compared制通 with traditional materials suc森什h as metals and ceramics, it is easy 少男to process, easy to recycle, and has lo理厭w energy consumption through日購out its life cycle. It is你呢 a green and environmenta請司lly friendly environm錢和ent. Friendly materia費嗎ls. From the structural point o醫冷f view, polybutene (PB) is a 南器linear isotactic sem是林i-crystalline thermoplastic materia國站l, which is non-toxic and pollu著冷tion-free during proc路問essing and use, and can be repeat藍煙edly heated for molding. Theref船厭ore, polybutene (PB) combin行費es the advantages of hygiene, proc白快essability, surface finish, st明樂rength, flexibility and connectivity司問, and achieves a comprehensive balance木月 in physical properties, thermodyn時照amic properties, and fun妹畫ctionality, thus giving poly會生 Butene (PB) plastic pipes have ma暗地ny unique characteristics, wh區線ich can open up a wide rang暗相e of applications in the fie友算ld of fluid transportation syste說時ms, especially in the field of hot wat線問er transportation systems in 國和buildings.

(4) PE-RT tube
PE-RT stands for hea學唱t-resistant polyethylene雨視. It is the abbreviation of 票場Polyethylene of raised temper頻吧ature resistance. It is a kind of non-c紅知rosslinked polyethyle什農ne that can be used for ho紙腦t water pipes. Some people 購員also highlight its n會土on-crosslinking characteri女從stics and call it " High temperature r就日esistant non-crosslinked polyethylen對說e". It is a medium-density po報通lyethylene produced by a special服吧 molecular design and s對些ynthesis process. It adopt什下s a copolymerization me行友thod of ethylene and octen去聽e, and obtains a unique molecular街山 structure by controlling the number 些如and distribution of s員爸ide chains to improv媽分e the resistance of PE. Thermal也道. Due to the existence of short oc快山tene chains, the macrom家我olecules of PE can not be cry務城stallized in a flaky crystal, but pene化說trated through severa也聽l crystals, forming a connection bet劇線ween the crystals, it 信信retains the good flexibility of PE, hi開歌gh Thermal conductivity and inertness理話, while making it more pressure resista議體nt, this modification metho海西d is similar to the common器理 PPR on the market. PE-RT pipes ca議喝n be used for all us行區e levels of hot water pipes s唱呢pecified in ISO10508.子唱

(5) PPH
The high-density polypro答老pylene pipes used in drain (s筆化ewage) water pipes, waste water pipe報快s, rainwater pipes, and e有媽xhaust pipes should comply wi有近th the regulations of DIN53457不員 (ISO/R1133, ISO/R179, RAL), and t化花he installation method木能 should use electric 坐還welded sleeves and butt joint技算s as far as possible Method constru路還ction.

(6) PP-B
Because of the use of fusio歌跳n technology in construct科劇ion. Therefore, it is also comm有兒only known as hot melt tube. It 那間is non-toxic, light weight飛去, pressure resistant and corro爸討sion resistant, and is b吧用ecoming a popular material, 銀生but it is still less used in decoration草書 projects. Generally spea體明king, this material is not only個鄉 suitable for cold wate為和r pipes, but also for hot water p對有ipes and even pure dr音暗inking water pipes.

(7) PEX tube
Cross-linked polyethylene pipe 樹頻(PEX) Generally speaking, this ma為高terial is thermally welded. The adva我門ntages of pex pipe: good p風報ressure resistance, nominal press從跳ure 1.25MPa, de16mm burst pressur鐵跳e greater than 6MPa, de20mm burst pr睡雜essure greater than 5MPa; wide tem年音perature resistance range ：-70—技都—95℃ (short-time 110℃);笑厭 resistant to acid and alkali corrosi影黑on, can be used for the t工劇ransportation of a variety of 機制chemical substances; high tem黃他perature resistance, exce但上llent low temperature per在好formance; smooth inner and out朋服er walls of the pipe, low resistance謝視, no scaling; clean, no pollution, 地弟It can save people the pai雨離n of citing "yellow water" and "rusty 姐著water"; 　The use of special票計 pipe fittings can be ea什業sily and quickly installed withou一藍t tapping, buckling, and 算開welding; it is easy to bend and fle朋亮xible, which saves pipe fittings; 外來light weight, Compared可喝 with the same period, the 資船pipe length is only 1/10 of慢到 that of galvanized steel pipe; it 鄉老has good thermal insulation p路紙erformance; it has a long道農 service life, at 70℃, working pre志黃ssure ≤0.8MPa, and the continuou的算s service life is 50 yea冷弟rs. The defect is that the connect白頻ion cannot be hot-melted, 裡兒which limits its scope of application i都制n HVAC and water supply.

3. Composite pipe

(1) Aluminum-plastic composi海東te pipe
It is the first water su但窗pply pipe to replace哥光 cast iron pipe. Its basic stru們林cture should be five l中西ayers, namely plastic, hot melt adhesi拿黑ve, aluminum alloy, hot melt要票 adhesive, plastic, e街路tc. from the inside to the ou女舊tside.
The aluminum-plastic composit黃作e pipe has good thermal insulation per低志formance, the inner and outer walls are新東 not easy to corrode, becau報上se the inner wall is smo哥有oth, the resistance to你得 fluid is small; and bec媽藍ause it can be bent a視他t will, the installation and construc弟北tion are convenient. As a water s相跳upply pipeline, the aluminum-plasti拍跳c composite pipe has suf他長ficient strength, but if the la裡技teral force is too la月知rge, the strength wi業海ll be affected. Ther唱姐efore, it should be constructed as an o民月pen pipe or buried in the wall,我雨 but it is not suitable人是 to be buried in the ground. The c章坐onnection of the alum為報inum-plastic composite pipe is 麗美of the ferrule type, 不腦so the first step in離到 the construction is to 業農pass a strict pressure test to鐘線 check whether the connection i多從s firm. The second is to p河火revent frequent vibratio下小n and loosen the ferrul章刀e. The third is to leave enough in弟木stallation amount in the length d愛房irection to avoid pul腦裡ling off.

(2) Steel-plastic composite pipe
Steel-plastic composite pipe, the produ行錯ct uses seamless steel pipe and welded笑時 steel pipe as the bas靜看e pipe, and the inner wall 醫也is coated with high-adhe雜喝sion, anti-corrosion, food-gra聽事de sanitary polyethylene p水但owder coating or epoxy resin coating.了說 The water-supply galvanized and p商美lastic-coated composit就內e steel pipe made of pre-treat舊數ment, pre-heating, internal coating, 城要leveling, and post-treatment process還子es is an upgraded product of the trad員林itional galvanized pipe. The 們了product implements the CJT120-2000微老 industry standard of the討歌 Ministry of Construct物到ion. Caliber range D遠了N15--DN1200 can be painted with西服 flanges and pressure grooves. Lengt兵坐h 6m, 9m, 12m and inde多拿finite length. Coating wall thicknes事也s is between 100 microns and 50話美0 microns, usually 350 mic南務rons. Pipeline connection 票長threaded connection, flange connec白音tion, clamp connection pre-treatment C得數hemical dip tank method, physical請日 sandblasting method Coating短都 varieties Thermoplastic polyet習美hylene powder (PE), ther子音mosetting epoxy powder (EP) an她機d other powder coatin答大gs Product characteristics

1． Hygienic, non-toxic, no foulin藍為g, no microorganisms, and guarantee喝街 of fluid quality.
2.  Resistant to chemical corros門店ion, soil and marine org間到anism corrosion, and 家農cathodic disbondment resista遠身nce
3． The installation proce鐘腦ss is mature, convenient and fast, and 銀年the connection is simi風業lar to ordinary galvanized 近站pipes.
4． Good weather resistance, s習河uitable for harsh environmen靜匠ts such as deserts and saline alkal業小is.
5． The pipe wall is smooth,鐵媽 the conveying efficie紙弟ncy is improved, and the service lif通愛e is long.

(3) Outer layer welding typ厭劇e
The outer layer welding t匠通ype aluminum-plastic composite到明 pipe includes an oute現學r layer of random copolymer p日懂olypropylene co-extruded plastic layer中光, and a hot-melt adhesive la藍什yer is connected to t爸銀he inner surface of the random cop冷樹olymer polypropylene 船體co-extruded plastic l金媽ayer. The inner surface of the mixtu樹藍re layer is connected with an al雪白uminum tube layer, the inne物我r surface of the aluminum tube la到也yer is connected with 月湖a hot melt adhesive lay船費er, and the inner surface of t理吃he hot melt adhesive照靜 layer is connected with a polyethylene路雜 co-extruded plastic layer; the utilit腦不y model It has excellent知理 high temperature resistance and劇站 small thermal deformatio說弟n characteristics of aluminum-plast知師ic composite pipes, an森員d the reliability of hot melt connectio老那n with PP-R pipes. It can be wid低愛ely used in cold and hot wate離在r pipes and drinking water syste費土ms, heating pipes, floors, walls, and h開可eating. Systems, solar heating, cooli器海ng systems, industrial fl腦都uid conveying systems, central 男農air-conditioning systems, compre吃空ssed air pipeline systems and other fi黑們elds.

(4) Bimetal composite type
Lined with stainless steel compos綠子ite pipe, the product is based on galva了數nized steel pipe and lined with 不很thin-walled stainless steel, 男子which can not only meet the advantag服她es of stainless steel safety, san文地itation, health and durability, 科短but also eliminate the problem of plas我森tic pipe pollution, an制筆d the price is also higher than that o商媽f copper pipes. And the stainless st亮志eel pipe saves a lot, and can be insta可人lled and constructed safely, con姐司veniently and reliably業睡, and has a high pressure-bearing c身月apacity. It is a new type of 靜都environmentally friendly, green 答計and energy-saving product.