理解聚氨酯發(fā)泡保溫鋼管的用途
Understanding the Use of Polyurethane Foamed Insulation Pipe
在、小直徑傳熱原油或加熱管道中，爲了增加管道對土壤的散熱，在管道內(nèi)部添加了一個保溫復(fù)合層。常用的保溫資料是硬質(zhì)聚氨酯泡沫，溫度范圍爲-185120°C。材質(zhì)質(zhì)地柔軟。爲了進步其強度，在絕緣層的外側(cè)施加一層高密度聚乙烯以構(gòu)成復(fù)合構(gòu)造，以避免地下水浸透到保溫層中。
In order to increase the heat dissipation of pipeline to soil, an insulating composite layer is added to the pipeline interior in small diameter heat transfer crude oil or heating pipeline. The commonly used thermal insulation material is rigid polyurethane foam with a temperature range of -185 to 120 degrees C. The material is soft. In order to improve its strength, a layer of high density polyethylene (HDPE) is applied to the outer side of the insulating layer to form a composite structure so as to avoid the infiltration of groundwater into the insulating layer.
高壓成品聚氨酯發(fā)泡設(shè)備用于在鋼管的表面面停止拋丸處置，在外維護管的內(nèi)外表停止電暈處置，以進步保溫管的粘接功能。保溫層資料是硬質(zhì)聚氨酯泡沫，密度爲60kg / m380kg / m3，填充了鋼管與套筒之間的間隙并具有一定的粘接強度，這使得鋼管、外殼和保溫層。構(gòu)成一個堅實的全體。聚氨酯泡沫具有良好的機械功能和隔熱功能。它通?？梢越邮?20°C的溫度。經(jīng)過改性或與其他絕緣資料組合，它可以耐溫180°C。
High-pressure polyurethane foaming equipment is used to stop shot blasting on the surface of steel pipe and corona treatment on the inner and outer surface of external maintenance pipe to improve the bonding function of insulation pipe. The insulation material is rigid polyurethane foam. The density is 60kg / m3 to 80kg / m3, filling the gap between the steel tube and the sleeve and having a certain bonding strength, which makes the steel tube, shell and insulation layer. Construct a solid whole. Polyurethane foam has good mechanical function and thermal insulation function. It usually accepts a temperature of 120 degrees C. After modification or combination with other insulation data, it can withstand 180 C temperature.
預(yù)制聚氨酯保溫鋼管從內(nèi)到外分爲三層：
Prefabricated polyurethane insulating steel pipes are divided into three layers from inside to outside.
一層：任務(wù)鋼管層
Layer 1: Task Steel Tube Layer
依據(jù)設(shè)計和客戶要求，通常運用無縫鋼管、螺旋鋼管和直縫鋼管。鋼管外表經(jīng)過初級噴丸除銹處置后，按GB / T8923-1988規(guī)范，鋼管除銹等級到達Sa2級，GB6060.5-88規(guī)范中外表粗糙度可達R = 12.5微米。
According to the design and customer requirements, seamless steel pipe, spiral steel pipe and straight seam steel pipe are usually used. After primary shot peening treatment, according to GB/T8923-1988 specification, the steel tube rust removal grade reaches Sa2 grade, and the surface roughness in GB6060.5-88 specification can reach R = 12.5 micron.
第二層：聚氨酯保溫層：
Second layer: polyurethane insulation layer:
高壓發(fā)泡機用于將硬質(zhì)聚氨酯泡沫原料注入到在鋼管和外護套之間構(gòu)成的空腔中，這通常被稱爲“管管發(fā)泡”。
The high pressure foaming machine is used to inject rigid polyurethane foam material into the cavity formed between the steel pipe and the outer sheath, which is usually called "tube foaming".
第三層：高密度聚乙烯維護層：
Layer 3: High Density Polyethylene Maintenance Layer:
預(yù)成型爲具有一定壁厚的黑色或黃色聚乙烯塑料管。聚乙烯無味，，蠟質(zhì)，具有優(yōu)異的耐高溫性，可在-70-100°C的高溫下運用。它具有良好的化學波動性，并且耐大少數(shù)酸和堿（不耐氧化性）。酸）在常溫下不溶于普通溶劑，吸水率低，但由于它是線性分子，它可以遲緩溶解在一些無機溶劑中，不溶脹，并具有優(yōu)異的電絕緣功能。它的作用是維護聚氨酯保溫層免受機械硬物損傷，第二是防腐蝕、防水。高密度聚乙烯泡沫塑料保溫鋼管執(zhí)行：SY / T114-2000和SY / T115-2001規(guī)范。
The preform is a black or yellow polyethylene plastic pipe with a certain wall thickness. Polyethylene is odorless, non-toxic, waxy and has excellent high temperature resistance. It can be used at high temperatures ranging from - 70 to - 100 degrees C. It has good chemical fluctuation and resistance to a large number of acids and bases (oxidation resistance). Acids) are insoluble in ordinary solvents at room temperature and have low water absorption, but because they are linear molecules, they can be slowly dissolved in some inorganic solvents, do not swell, and have excellent electrical insulation function. Its function is to maintain polyurethane insulation layer from mechanical hard damage, the second is anti-corrosion, waterproof. High density polyethylene foam insulation steel pipe execution: SY/T114-2000 and SY/T115-2001 specification.
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