聚乙烯聚氨酯保溫鋼管是什麼資料
What information is polyethylene polyurethane insulating steel pipe?
聚乙烯聚氨酯保溫鋼管是依據(jù)保溫鋼管的外殼來命名的，外層是聚乙烯外殼。
Polyethylene polyurethane insulating steel pipe is named after the outer shell of the insulating steel pipe, and the outer shell is polyethylene.
一層：任務(wù)鋼管層
Layer 1: Task Steel Tube Layer
依據(jù)設(shè)計(jì)和客戶的要求普通選用無縫鋼管、螺旋鋼管和直縫鋼管。鋼管外表經(jīng)過的拋丸除銹工藝處置后，鋼管除銹等級可達(dá)GB/T8923-1988規(guī)范中的Sa2級，外表粗糙度可達(dá)GB6060.5-88規(guī)范中R=12.5微米。
Seamless steel pipe, spiral steel pipe and straight seam steel pipe are generally selected according to design and customer requirements. After treatment by advanced shot peening rust removal process, the steel tube rust removal grade can reach Sa2 level in GB/T8923-1988 specification, and the surface roughness can reach R=12.5 micron in GB6060.5-88 specification.
第二層：聚氨酯保溫層：
Second layer: polyurethane insulation layer:
用高壓發(fā)泡機(jī)在鋼管與外護(hù)層之間構(gòu)成的空腔中一次性注入硬質(zhì)聚氨酯泡沫塑料原液而成，即俗稱的“管中管發(fā)泡”。
High-pressure foaming machine is used to inject rigid polyurethane foam plastics into the cavity formed between the steel pipe and the outer sheath at one time, which is commonly known as "tube-in-tube foaming".
第三層：高密度聚乙烯維護(hù)層：
Layer 3: High Density Polyethylene Maintenance Layer:
預(yù)制成一定壁厚的黑色或黃色聚乙烯塑料管材。聚乙烯無臭，，手感似蠟，具有優(yōu)良的耐高溫功能，低運(yùn)用溫度可達(dá)-70～-100℃，化學(xué)波動性好，能耐大少數(shù)酸堿的腐蝕(不耐具有氧化性質(zhì)的酸)，常溫下不溶于普通溶劑，吸水性小，但由于其爲(wèi)線性分子可遲緩溶于某些無機(jī)溶劑，且不發(fā)作溶脹，電絕緣功能優(yōu)良。其作用一是維護(hù)聚氨酯保溫層免遭機(jī)械硬物毀壞，二是防腐、防水。高密度聚乙烯聚氨酯發(fā)泡保溫鋼管執(zhí)行：SY/T114-2000和SY/T115-2001規(guī)范。
Prefabricated black or yellow polyethylene plastic pipes with a certain wall thickness. Polyethylene is odorless, non-toxic, waxy-like and has excellent high temperature resistance. The lowest operating temperature can reach - 70 ~100 C. It has good chemical fluctuation, and can resist corrosion of a large number of acids and bases (not resistant to oxidizing acids). It is insoluble in ordinary solvents at room temperature and has little water absorption, but it can be slowly dissolved in some inorganic solvents due to its linear molecule, and does not swell, and has electrical insulation function. Excellent. Its function is to maintain the polyurethane insulation layer from the destruction of mechanical hard objects, and the second is anti-corrosion and waterproof. High density polyethylene polyurethane foamed insulation steel pipe execution: SY/T114-2000 and SY/T115-2001 specification.
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