人民日報網，勝倉新聞近日報道：襯塑鋼管，以鍍鋅無縫鋼管、焊接鋼管為基管，內壁去除焊筋后，襯入與鍍鋅管內等徑的食品級聚乙烯（PE）管材，聚乙烯襯層厚度要求符合CJ/T136-2007標準，最后加壓加熱一定時間后成型，是傳統鍍鋅管的升級型產品。
With the galvanized seamless steel pipe and welded steel pipe as the base pipe, the inner wall of the pipe is removed and the food grade polyethylene (PE) pipe with the same diameter as the galvanized pipe is lined. The thickness of the polyethylene liner meets the CJ/T136-2007 standard. Finally, the product is formed after pressurized heating for a certain time. It is an upgrade product of the traditional galvanized pipe.
優缺點對比:
優點
1、適用范圍廣泛、規格品種齊全：
截止2013.6.19，在建筑給水行業中，高層建筑的給水管和消防管材長期使用壓力約為1.6MPa左右，
因此內筋嵌入式襯塑鋼管的設計壓力確定在2.0MPa基本上能滿足建筑給水的壓力使用要求，同時這一參數也是壁厚設計的重要參數。 使用溫度也是管材設計的一個重要參數，它決定著材料的許用應力。在行業中按輸送水的溫度分為冷水和熱水，冷水溫度一般為0℃～25℃，但明裝管路內介質溫度受大氣溫度影響，我國南方夏季氣溫可高達40℃左右，而北方氣溫在冬季可低于-40℃，但是水于0℃以下就會凝固成冰，從而達不到用水的目的。因此在行業中有保溫的一些規范，使管路中水的溫度一直保持在0℃以上，以保持流體的可流動性。熱水一般用于采暖、淋浴，水溫通常為75℃以下，瞬間溫度可達為95℃左右。 介于以上調研，內筋嵌入式襯塑鋼管分為冷水型和熱水型兩大類，確定冷水型長期使用溫度為0℃～55℃，熱水型管材的長期使用溫度為0℃～75℃，瞬間溫度可達95℃。
Comparison of advantages and disadvantages:
Advantage
1, wide range of applications, specifications and varieties:
As of June 19, 2013, in the construction water supply industry, the long-term service pressure of water supply pipes and fire-fighting pipes in high-rise buildings was about 1.6 MPa.
Therefore, the design pressure of embedded plastic-lined steel pipe with inner rib can meet the requirement of building water supply basically at 2.0 MPa, and this parameter is also an important parameter of wall thickness design. Using temperature is also an important parameter of pipe design, which determines the allowable stress of materials. In the industry, water is divided into cold water and hot water according to the temperature of water conveyance. The temperature of cold water is generally between 0 and 25 degrees centigrade, but the temperature of medium in open-packed pipeline is affected by atmospheric temperature. The temperature of summer in southern China can be as high as 40 degrees centigrade, while the temperature of Northern China can be lower than - 40 degrees centigrade in winter, but the water will solidify into ice below 0 degrees centigrade, so it can not be used. The purpose of water. Therefore, there are some insulation standards in the industry, so that the water temperature in the pipeline has been maintained above 0 degrees Celsius to maintain the fluidity of the fluid. Hot water is generally used for heating, shower, water temperature is usually below 75 degrees Celsius, instantaneous temperature can reach about 95 degrees Celsius. Based on the above investigation, the embedded plastic-lined steel pipes with inner ribs can be divided into two types: cold-water type and hot-water type. The long-term service temperature of cold-water type is 0 55, hot-water type pipes are 0 65507
2、生產工藝獨特：
在產品結構確定后采用何種工藝進行生產是截止2013.6.19經濟活動中至關重要的，
它直接關聯了產品的生產成本和生產效率，同時又反過來對產品的結構設計、材料的選擇提出工藝上的要求。內筋嵌入式襯塑鋼管采用獨特的機械拉拔復合工藝，通過對金屬管的縮徑壓迫內層塑料管，使兩種材料產生永久性合理過盈，加之焊管內表面獨特設計的花紋內筋對塑料管外表面的嵌入作用，以及塑料管復合前的物理和化學改性，使得內筋嵌入式襯塑鋼管具有不分層、不縮管，長期使用有保障的技術特點。并于2001年獲國家實用新型專利。這種獨特的工藝生產效率高，過程控制易行，復合質量高。
2, the production process is unique:
What process will be adopted after the product structure is determined is crucial in the economic activities up to June 19, 2013.
It is directly related to the production cost and efficiency of the product, and at the same time, on the contrary, it puts forward technological requirements for the structure design and material selection of the product. Embedded plastic-lined steel pipe with inner ribs adopts a unique mechanical drawing composite process. By compressing the inner plastic pipe with the reduction of the diameter of the metal pipe, the permanent and reasonable interference between the two materials can be produced. In addition, the embedding effect of the specially designed inner ribs on the outer surface of the plastic pipe and the physical and chemical modification of the plastic pipe before compounding can be achieved. It makes the embedded plastic-lined steel pipe with inner ribs have the technical characteristics of non-stratification, non-shrinkage and long-term use. In 2001, it won the national utility model patent. This unique technology has high production efficiency, easy process control and high composite quality.
3、連接方式可靠快捷：
管道之間的連接方式是建材行業最重要的問題，連接強度可不可靠、便不便于安裝、維修，能不能適應惡劣的自然條件，這些問題都是用戶、設計、施工等各個單位最關心的問題。內筋嵌入式襯塑鋼管利用冷擠壓原理在距管材端面一定距離作引伸變形成一小型圓弧槽，再將卡簧式不銹鋼卡環置入槽內，套上螺母或性擴展接口、新型搪瓷管件及其附件，旋緊即可，安裝快捷。由于卡環配合部位的錐面自鎖設計，以及采用端向和徑向的雙向密封設計，使之具有可靠的連接強度和抗滲漏性能。同時由于所有管接頭采用的是可拆卸結構，加之專用活接管件的配合使用，使其維修極其方便。
3. Reliable and quick connection.
The connection mode between pipelines is the most important problem in building materials industry. The unreliable connection strength, inconvenient installation and maintenance, and can adapt to the harsh natural conditions are the most concerned problems of users, design, construction and other units. The embedded plastic-lined steel pipe with inner rib is stretched and deformed into a small arc groove at a certain distance from the end face of the pipe by cold extrusion principle, and then the clasp spring type stainless steel clasp ring is put into the groove, and the nut or sexual expansion interface, the new type of enameled pipe and its accessories are put on, which can be tightened and installed quickly. Because of the self-locking design of the conical surface of the clamping ring matching part and the two-way sealing design of the end direction and the radial direction, the clamping ring has reliable connection strength and anti-leakage performance. At the same time, because all the pipe fittings are of detachable structure and special flexible fittings are used together, the maintenance is extremely convenient.
4、外表面的防蝕措施完善：
眾所周知，鋼鐵的腐蝕是非常普遍的，由此帶來的經濟損失是巨大的。
我們知道鋼鐵的腐蝕主要是由于電化學腐蝕，塑料的腐蝕老化主要是化學腐蝕以及紫外線照射而引起的，內筋嵌入式襯塑鋼管由于內層塑料管由外層金屬管庇護，徹底消除了塑料腐蝕老化的成因，使塑料管具有經久耐用的性能。而外層金屬管的保護卻要困難得多。內筋嵌入式襯塑鋼管的外表面采用了三層防蝕措施：第一層為鍍鋅層，鋼管形成陰極進行保護防銹。第二層：環氧底漆，在鍍鋅層外表形成致密的高分子保護膜，使之與空氣、水隔離，減緩鋅層的氧化腐蝕，從而提高管材的使用年限。第三層：面漆，加強膜的保護作用，提高產品的美觀程度。在埋地使用時，采用適當的防腐措施以提高系統的使用壽命；也可采用于襯塑鋼管為基管，外表面再覆一層塑料管的“內筋嵌入式雙面襯塑鋼管”（PE管+碳鋼管+PP管系列產品直接埋地使用。
4. The anti-corrosion measures on the outer surface are perfect.
As we all know, corrosion of steel is very common, resulting in huge economic losses.
We know that the corrosion of steel is mainly due to electrochemical corrosion. The corrosion and aging of plastics are mainly caused by chemical corrosion and ultraviolet radiation. The embedded plastic-lined steel pipes with inner ribs are sheltered by outer metal pipes, which completely eliminate the causes of corrosion and aging of plastics and make them durable. . The protection of outer metal tubes is much more difficult. Three layers of corrosion prevention measures were adopted on the outer surface of the embedded plastic-lined steel pipe with inner ribs: the first layer was galvanized, and the steel pipe formed a cathode to protect against rust. The second layer: epoxy primer, forming a dense polymer protective film on the surface of the galvanized layer, isolating it from air and water, slowing down the oxidation corrosion of the zinc layer, thereby increasing the service life of the pipe. The third level: topcoat, strengthen the protection function of the film, improve the beauty of the product. In the buried use, appropriate anti-corrosion measures can be adopted to improve the service life of the system; it can also be used as a base pipe lined with plastic pipes, the outer surface of which is covered with a layer of plastic pipes "embedded double-sided plastic-lined steel pipes" (PE pipe + carbon pipe + PP pipe series products directly buried.
5、焊管壁厚合理：
壁厚是一重要參數，在《機械設計手冊》第3冊給出的管道壁厚的設計公式： S=PD/（2[δ]ψ）+C 式中:S：管壁厚(mm) P：管內介質壓力（MPa）； D：管外徑（mm）； [δ]：工作溫度下的管材許用應力（MPa）； j：管材縱向焊縫系數，無縫鋼管j = 1；對焊接鋼管j = 0.8； C：管壁厚度附加值（mm）；包括制造負偏差C1；腐蝕裕度C2；螺紋深度C3；C= C1+ C2+ C3。 內筋嵌入式襯塑鋼管按以上理論確定焊管壁厚。管道材料的許用應力[δ]一般按材料的各項強度分別除以對應的安全系數，取其中的最小值作為該材料的許用應力，該值為管道材料容許承受的應力。同時由于內筋嵌入式襯塑鋼管采用卡環式連接，冷擠壓變形制槽，不需考慮管壁厚度附加值的C3。因而與傳統鍍鋅鋼管相比，壁厚更加合理，經濟性有明顯的潛力。
5. The thickness of welded pipe is reasonable.
Wall thickness is an important parameter. The design formula of pipe wall thickness given in Book 3 of Mechanical Design Manual: S = PD /(2 [delta] _) + C: S: pipe wall thickness (mm) P: medium pressure (MPa); D: pipe diameter (mm); delta: allowable stress (MPa); j: pipe longitudinal weld coefficient, No. Seam steel pipe J = 1; welded steel pipe J = 0.8; C: pipe wall thickness added value (mm); including manufacturing negative deviation C1; corrosion margin C2; thread depth C3; C = C1 + C2 + C3. The embedded steel pipe with inner reinforcement is used to determine the thickness of welded pipe according to the above theory. The allowable stress [delta] of pipeline material is generally divided by the corresponding safety factor according to the strength of the material, and the minimum value is taken as the allowable stress of the material, which is the allowable stress of pipeline material. At the same time, because the embedded plastic-lined steel pipe with inner ribs is connected by clamping ring, the cold extrusion deformation grooving does not need to consider the additional value of the wall thickness of C3. Therefore, compared with the traditional galvanized steel tube, the wall thickness is more reasonable and the economy has obvious potential.
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