聚氨酯保溫鋼管的裝置要求
Installation Requirements for Polyurethane Thermal Insulation Pipe
聚氨酯保溫鋼管因其體積大分量大，在裝置時(shí)一定要恪守操作標(biāo)準(zhǔn)，上面我們說一說聚氨酯保溫鋼管的裝置。
Polyurethane insulating steel pipes because of its large volume and heavy weight, in the installation must abide by the operating standards, we said above about the polyurethane insulating steel pipes device.
1、外地溝底部下層的承載力≤60KPa時(shí)，地溝底部應(yīng)加墊素混凝土層。
1. When the bearing capacity of the lower floor of the outer ditch is less than 60KPa, plain concrete layer should be added to the bottom of the ditch.
2、C15素混凝土層底部土層應(yīng)先夯實(shí)后，再澆混凝土，混凝土層外表應(yīng)潤滑平整。當(dāng)?shù)撞客翆訝?wèi)濕陷性土質(zhì)時(shí)，應(yīng)換上(深1.0m左右)并夯實(shí)。
2. The soil layer at the bottom of C15 plain concrete layer should be compacted before pouring concrete. The surface of the concrete layer should be smooth and lubricated. When the bottom soil is collapsible, it should be replaced (about 1.0 m deep) and compacted.
3、地溝內(nèi)接頭處的地溝寬度和深度應(yīng)比非接頭處添加250～300mm 。
3. The width and depth of the ditch at the joint of the ditch should be 250-300 mm more than that at the non-joint.
4、設(shè)有波紋補(bǔ)償器的地位，波紋補(bǔ)償器底部的土層標(biāo)高應(yīng)依據(jù)補(bǔ)償器的實(shí)踐到貨尺寸確定。
4. The position of the corrugated compensator, and the soil elevation at the bottom of the corrugated compensator should be determined according to the actual arrival size of the compensator.
5、溝底下層沿管線的坡度應(yīng)保證同管道的坡度分歧。
5. The slope along the pipeline at the bottom of the ditch should be different from that of the pipeline.
6、直埋管道四周100mm用細(xì)砂境實(shí)。砂粒直徑應(yīng)不大于8mm，砂層中不可合有粘土、磚、石、鐵件等雜物。
6. Fine sand is used around 100 mm of buried pipeline. The diameter of sand should be no more than 8 mm. Clay, brick, stone, iron and other impurities should not be mixed in the sand layer.
7、當(dāng)管道理設(shè)在爐渣、雜物等腐蝕性較強(qiáng)的土層地段時(shí)，回填土應(yīng)換以腐蝕性較小的土壤，并分層夯實(shí)。
7. When the pipeline is located in the corrosive soil such as slag and sundries, the backfill should be replaced by the less corrosive soil and compacted layer by layer.
8、溝槽必需做好排水任務(wù)，可采用排水溝，集水池用水泵掃除。
8. Grooves must be drained well. Drainage ditches can be used and water pumps can be used to clean the catchment pools.
聚氨酯保溫鋼管管道的裝置必需在管溝開挖和溝底土層處置合格后停止。裝置時(shí)留意以下要求；
The installation of polyurethane insulating steel pipe must be stopped after the ditch excavation and the disposal of the soil layer at the bottom of the ditch are qualified. Pay attention to the following requirements when installing the device.
1、管道下溝前需對其處外表的防腐層停止仔細(xì)反省，發(fā)現(xiàn)防腐層有損壞的，應(yīng)及時(shí)停止處置。
1. Before the pipeline goes down the ditch, it is necessary to stop carefully introspecting the anticorrosive coatings on its exterior. If it is found that the anticorrosive coatings are damaged, it should stop disposing of them in time.
2、管道對接時(shí)，應(yīng)保證管道設(shè)計(jì)軸線及坡度。
2. Pipeline design axis and slope should be guaranteed when docking.
3、預(yù)制保溫管可單根吊入溝內(nèi)裝置，也可兩根或多根組織焊完后吊裝。當(dāng)組焊管段較長時(shí)，宜用兩臺或多臺吊車抬管下管，吊點(diǎn)的地位按均衡條件選定。嚴(yán)禁將管道間接推入溝內(nèi)。
3. Prefabricated insulating pipes can be hoisted into ditches by a single device, or two or more tissues can be hoisted after welding. When the welded pipe section is long, two or more cranes should be used to lift the lower pipe, and the position of the hanging points should be selected according to the equilibrium conditions. It is strictly forbidden to push pipelines indirectly into ditches.
4、任務(wù)鋼管焊接完成并經(jīng)檢驗(yàn)合格后，即可處置接頭的保溫、外套管銜接的任務(wù)，可先立模停止聚氨脂發(fā)泡，再用熱縮帶將接頭局部全體密封，兩端和直管各搭接100mm；也可先將外套管對焊處置，并經(jīng)密封反省合格后開孔發(fā)泡。
4. After the welding of task steel pipe is completed and passed the inspection, the task of joint insulation and outer casing connection can be handled. The polyurethane foaming can be stopped by erecting the die first, and then all the joints can be sealed locally with the heat shrinkage belt. Both ends and straight pipes can be overlapped by 100mm. The outer casing can also be handled by butt welding first, and after sealing and introspection, it can be qualified before opening and foaming.
5、當(dāng)日工程竣工時(shí)應(yīng)將管端用盲板封堵，以防泥、水進(jìn)入管內(nèi)。
5. When the project is completed on that day, the pipe end shall be sealed with blind board to prevent mud and water from entering the pipe.
6、預(yù)制保溫管有冷裝置、熱預(yù)應(yīng)力裝置和一次性補(bǔ)償器裝置三種方式。
6. Prefabricated insulating pipes have three ways: cooling device, thermal prestressing device and disposable compensator device.
7、冷裝置就是間接將管段各段銜接，并經(jīng)檢驗(yàn)合格后按規(guī)范回填即可；
7. The cooling device is to connect the segments indirectly and fill them back according to the specifications after passing the inspection.
8、熱預(yù)應(yīng)力裝置是先將管道預(yù)熱任務(wù)溫度的60％時(shí)焊接，然后回填夯實(shí)。
8. The thermal prestressing device is to weld the pipeline when it is preheated to 60% of the task temperature, and then fill and compact it.
9、一次性補(bǔ)償器必需在管道升溫任務(wù)溫度的60％時(shí)焊接，再停止回填和夯實(shí)。
9. The disposable compensator must be welded when the pipeline is heated to 60% of the task temperature, and then stop backfilling and tamping.
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