1. When polyurethane is poured, the construction environment temperature should be 10-40 C and the relative humidity should be less than 80%.

2、灌注后的硬泡聚氨酯保溫層應(yīng)充沛熟化后，再停止下道工序的施工。

2. The rigid foam polyurethane insulation layer after filling should be fully ripened before stopping the construction of the next process.

3、灌注后的硬泡聚氨酯保溫層外表應(yīng)當(dāng)潤滑，無明顯凹陷突出。

3. The surface of rigid foam polyurethane insulation layer after filling should be lubricated without obvious depression and prominence.

鋼套鋼復(fù)合保溫鋼管保溫構(gòu)造根據(jù)滑動方式不同可分為兩大類：

According to the different sliding modes, the thermal insulation structure of steel-jacketed composite thermal insulation steel pipe can be divided into two categories:

內(nèi)滑動式：保溫構(gòu)造由工作鋼管、硅酸鋁、減阻層、微孔硅酸鈣、隔熱層、不銹鋼緊固鋼帶、鋁箔反射層、聚氨酯保溫層、外套鋼管、外防腐層組成。內(nèi)滑動型保溫鋼管是由保送介質(zhì)的鋼管+復(fù)合硅酸鹽或微孔硅酸鈣+硬質(zhì)聚氨酯泡沫塑料+外套鋼管+玻璃鋼殼防腐維護(hù)

Inside sliding type: thermal insulation structure consists of working steel pipe, aluminium silicate, drag reduction layer, micro-porous calcium silicate, thermal insulation layer, stainless steel fastening strip, aluminium foil reflective layer, polyurethane thermal insulation layer, coated steel pipe and external anti-corrosion layer. Inside sliding insulating steel pipe is anti-corrosion maintenance of steel pipe with delivery medium + composite silicate or micro-porous calcium silicate + rigid polyurethane foam plastic + outer sleeve steel pipe + FRP shell.

外滑動式：保溫構(gòu)造由工作鋼管、玻璃棉保溫隔熱層、鋁箔反射層、不銹鋼緊固鋼帶、滑動導(dǎo)向支架、空氣保溫層、外護(hù)鋼管、外防腐層組成。層構(gòu)造構(gòu)成。各種管件節(jié)點(diǎn)保溫處置技術(shù)成熟，質(zhì)量牢靠。

External sliding type: thermal insulation structure consists of working steel pipe, glass wool thermal insulation layer, aluminum foil reflective layer, stainless steel fastening belt, sliding guide bracket, air thermal insulation layer, external steel pipe and external anti-corrosion layer. Layer structure. All kinds of tubular joint heat preservation treatment technology is mature and the quality is reliable.

鋼套鋼復(fù)合保溫鋼管是公開直埋管道中的一種，采用沒有混凝土構(gòu)造的狀況下也能夠停止公開直埋的方式，即工作鋼管的熱收縮在外管內(nèi)停止，從而降低了資料本錢，縮短了施工日期，并保證了供熱管道的平安性，能夠在不同溫度環(huán)境下更平安的普遍應(yīng)用，特別適用于高溫蒸汽管道項(xiàng)目。運(yùn)用溫度可達(dá)好℃-450℃。管道端口普通選用聚乙烯薄膜或三層PE冷纏帶密封，避免裝置前或施工中進(jìn)入潮氣或水。保溫資料多層錯縫包扎，有效減少了熱損失，同時在外套外表采取控制措施，避免冷橋的產(chǎn)生，從而使外套防腐層的溫度控制得到了保證。用保溫資料包扎多層鋁箔反射層，有效減少了熱損失，使蒸汽管道愈加經(jīng)濟(jì)合理。

Steel-jacketed steel composite insulation pipe is one of the open direct buried pipelines. It can stop the open direct burial without concrete structure, that is, the thermal shrinkage of the working steel pipe stops in the outer pipe, which reduces the cost of data, shortens the construction date, and ensures the safety of the heating pipeline. It can be used safely in different temperature environments, especially suitable. Used in high temperature steam pipeline project. The application temperature can reach to - 450 C. Pipeline ports are usually sealed with polyethylene film or three layers of PE cold wrapping tape to avoid entering moisture or water before installation or during construction. The multi-layer staggered seam binding of thermal insulation data effectively reduces the heat loss, and takes control measures on the outer surface of the coat to avoid the cold bridge, thus ensuring the temperature control of the coat anticorrosive layer. The multi-layer aluminum foil reflector coated with thermal insulation material can effectively reduce the heat loss and make the steam pipeline more economical and reasonable.

疏水系統(tǒng)采用全封鎖的方式，布置靈敏，構(gòu)造合理，平安牢靠。鋼套管上的排潮管既能及時排出濕潤氣體，又可作為日常運(yùn)轉(zhuǎn)的報警信號管。管道的熱補(bǔ)償采用波紋管補(bǔ)償器，并將其裝設(shè)在套管內(nèi)，做成直埋方式，無須設(shè)置察看井，施工操作便當(dāng)、工期短。適用于保送2.5MPa、350攝氏度以下的蒸汽或其它介質(zhì)，該產(chǎn)品用鋼管做外防護(hù)層，具有強(qiáng)度高，不易損壞，施工檢修煩瑣，運(yùn)用壽命長的優(yōu)點(diǎn)。

The drainage system is completely blocked, with sensitive layout, reasonable structure and safe and reliable operation. The tidal tube on the steel sleeve can not only discharge wet gas in time, but also serve as an alarm signal tube for daily operation. High quality bellows compensator is used for heat compensation of pipeline, and it is installed in casing to make it buried directly. There is no need to install inspection wells, so the construction operation is convenient and the construction period is short. It is suitable for escorting steam or other media below 2.5 MPa and 350 degrees Celsius. The product uses steel pipe as outer protective layer. It has the advantages of high strength, not easy to damage, cumbersome construction and maintenance, and long service life.