河北聚氨酯直埋保溫管無補償直埋敷設(shè)即利用土壤與外套管之間的摩擦阻力固定管道。當(dāng)土壤與管道的摩擦阻力之和等于或大于管道膨脹力時，管線不再伸長，即可不加補償器，這時管道在熱脹冷縮過程中所產(chǎn)生的位移勢能，被儲存在管道壁上；無補償直埋敷設(shè)時，在管道上不用設(shè)置補償器、滑動支架、固定支架等管道附件，管道在直管段基本處在停止?fàn)顟B(tài)，而在彎管、出土段等自由端所謂“摩擦長度l”范圍內(nèi)有位移；依據(jù)《集中供熱設(shè)計手冊》在交變次數(shù)15000次、熱媒允許溫差83℃以內(nèi)其應(yīng)力值不會超過許用應(yīng)力。這種埋設(shè)方式適用于95℃以下的低溫供熱管線。岳陽生活小區(qū)集中空調(diào)水溫為5℃~70℃，可采用無補償直埋敷設(shè)方式。

The polyurethane heat preservation pipe adopts hot water with temperature < 120 C in consideration of economy and safety, and the heat resistance of the polyurethane direct buried heat preservation pipe for heating can reach 120 C. So we only discuss the first two methods of direct buried heat preservation pipe.
1. No direct buried installation of polyurethane directly buried insulation pipe.
Hebei polyurethane direct buried insulating pipe is laid directly without compensation, that is, the pipe is fixed by friction resistance between soil and casing. When the sum of frictional resistance between soil and pipeline is equal to or greater than the expansion force of pipeline, the pipeline no longer elongates and no compensator is added, then the displacement potential energy produced in the process of thermal expansion and cold contraction of pipeline is stored on the wall of pipeline; when the pipeline is directly buried without compensation, no compensator, sliding support and fixed support are set up in the pipeline. The pipe fittings such as rack, etc. are basically at a stop state in the straight pipe section, but there is a displacement in the so-called "friction length l" range at the free end of elbow and unearthed section; according to the "Central Heating Design Manual", the stress value will not exceed the allowable stress within 15 000 cycles and the allowable temperature difference of heat medium within 83 C. The embedding method is suitable for low temperature heating pipelines below 95 degrees Celsius. The water temperature of central air conditioning in Yueyang residential district is 5 C ~70 C, which can be directly buried without compensation.

聚氨酯直埋保溫管其工作原理是將該種產(chǎn)品焊管道上，拆除定位角鋼,把管道加熱到要求的溫度，管道熱伸長，波紋膨脹節(jié)補償器被相應(yīng)壓縮，在此狀態(tài)下將補償器外套筒鋸形搭接焊縫焊死，此后補償器成為剛性整體，不再有補償能力。工作中則由管道的拉伸—壓縮彈性變型進行補償。用這種辦法，補償器補償了該段管道在設(shè)計溫差下產(chǎn)生的變形總量的一部分，它的作用只使管路工作中拉伸—壓縮的平衡點處于設(shè)計溫差下變形總量的中點。使拉伸、壓縮應(yīng)力基本相等，起降低管路拉伸或壓縮變形應(yīng)力的作用。一次性補償器適用于工作壓力≤1.6MPa、工作溫度≤120℃的管道，其使用壽命超過30年。

2. Polyurethane direct buried insulation pipe one-time compensation direct burial mode?
The working principle of polyurethane direct buried insulating pipe is to weld this kind of product on the pipe, remove the positioning angle steel, heat the pipe to the required temperature, pipe thermal elongation, corrugated expansion joint compensator is compressed accordingly, in this state the compensator sleeve sawtooth overlap weld is welded to death, after that the compensator becomes a rigid whole, no longer repaired. The ability to compensate. The work is compensated by the tension compression elastic deformation of the pipeline. In this way, the compensator compensates for a part of the total amount of deformation produced by the design temperature difference of the pipeline, and its effect only makes the equilibrium point of tension-compression in the pipeline work at the midpoint of the total amount of deformation under the design temperature difference. The tensile and compressive stresses are basically equal, which can reduce the stress of pipe drawing or compression deformation. The disposable compensator is suitable for pipes with working pressure < 1.6 MPa and working temperature < 120 C. Its service life is over 30 years.

供暖用直埋保溫管，用硬質(zhì)泡沫塑料保溫較常見的方式是采用硬聚抓乙烯管做保護層，即硬塑保護層。用硬塑保護層預(yù)制保溫鋼管，是使發(fā)泡液在兩端頭封閉的塑料套管與絕熱管道之間的空間發(fā)泡，{芤}*硬化，將管道、絕熱材料、保護層三者牢固地結(jié)為一體，形成“管中管”式的整體式絕熱結(jié)構(gòu)。所謂發(fā)泡液，是用兩種液態(tài)物質(zhì)加人催化劑、發(fā)泡劑和穩(wěn)定劑等原料調(diào)配而成的，例如聚異氛腺酸醋硬質(zhì)泡沫塑料的發(fā)泡液,用異氰脈酸酌和多元醇按比例調(diào)配而成的，聚氨醋硬質(zhì)泡沫塑料的發(fā)泡液是由聚醚和多元異氰酸醋按比例配制而成的。發(fā)泡液的特點是與空氣接觸0.5-1.0min后，分子間距增大，體積開始膨脹，俗稱發(fā)泡現(xiàn)象。發(fā)泡保溫前應(yīng)將保溫鋼管表面處清理干凈，不得有污物、油脂和鐵銹等，把無縫硬塑外殼套在鋼管上。硬塑管內(nèi)徑的大小根據(jù)鋼管外徑以及所需保溫層的厚度而定。一般情況下，絕熱層的厚度為30-50mm。將高度等于絕熱厚度的硬泡墊塊十字對稱地塞在兩管的環(huán)縫之中，使兩管中心保持同軸，然后把環(huán)縫兩端封堵上，侮個封堵卜留有一個圓孔，位于平置保溫鋼管的上部。將調(diào)制好的發(fā)泡液從封堵..上的圓孔注入兩管lbl環(huán)縫中，液體在環(huán)縫內(nèi)膨脹發(fā)泡，充滿整個環(huán)形空間，并牢固地附著在鋼管表面和硬塑殼的內(nèi)壁上。

The direct buried heat preservation pipe for heating and the rigid foam plastic heat preservation are usually used as the protective layer, that is, the rigid plastic protective layer. The prefabricated insulating steel pipe with rigid plastic protective layer is to make the foaming liquid foam in the space between the sealed plastic sleeve at both ends and the insulating pipe, {Eu}* hardening, and the pipe, the insulating material and the protective layer are firmly combined together to form a "pipe in pipe" type integral insulation structure. The so-called foaming liquid is made up of two kinds of liquid materials with human catalyst, foaming agent and stabilizer. For example, the foaming liquid of polyisocyanate vinegar rigid foam plastics is prepared with isocyanate pulse acid and polyols in proportion. The foaming liquid of polyurethane rigid foam plastics is made up of polyether and polyisocyanate vinegar in proportion. Examples are prepared. The characteristic of foaming solution is that after contacting with air for 0.5-1.0 minutes, the molecular distance increases and the volume begins to expand, commonly known as foaming phenomenon. Before foaming and heat preservation, the surface of the heat preservation pipe should be cleaned up. No dirt, grease or rust should be found. The seamless hard plastic shell should be sleeved on the pipe. The diameter of the rigid plastic pipe depends on the outer diameter of the steel pipe and the thickness of the required insulation layer. In general, the thickness of the insulation layer is 30-50mm. A rigid foam cushion with a height equal to the adiabatic thickness is inserted symmetrically in the annular seam of the two pipes so that the center of the two pipes remains coaxial. Then the two ends of the annular seam are plugged and a circular hole is left in the upper part of the flat thermal insulation pipe. The prepared foaming fluid is injected into the two LBL annular seams through the round holes in the plugging. The liquid expands and foams in the annular seams, filling the whole annular space, and firmly adheres to the surface of the steel pipe and the inner wall of the hard plastic shell.

嚴禁重污染天氣應(yīng)急響應(yīng)“一刀切”。各地要科學(xué)研判，提前預(yù)警，逐個企業(yè)制定重污染天氣應(yīng)急預(yù)案，細化到生產(chǎn)線、工序和設(shè)備，并在企業(yè)明顯位置公示，接受社會監(jiān)督。要嚴格按照重污染天氣預(yù)警級別啟動重污染天氣響應(yīng)措施(除國家要求和重大活動保障任務(wù)需要外)，提前1-2天發(fā)布預(yù)警信息，給足企業(yè)應(yīng)急響應(yīng)準(zhǔn)備時間，嚴禁擅自提高預(yù)警級別，擴大預(yù)警范圍。重污染天氣期間，對能夠穩(wěn)定達到國家或省規(guī)定的超低排放限值的工序和設(shè)備，達到“綠色”建材行業(yè)大氣污染物排放標(biāo)準(zhǔn)目標(biāo)的企業(yè)，按照“多排多限、少排少限、不排不限”的原則，采取適度應(yīng)急減排措施，嚴禁“一刀切”。
  (十)嚴禁督察執(zhí)法檢查“一刀切”。專項督察和強化督查是打贏藍天保衛(wèi)戰(zhàn)的既定部署和保障措施，執(zhí)法檢查是加強環(huán)境監(jiān)管和打擊環(huán)境違法行為的必然要求，要堅定不移、真督實查、不循私情、鐵腕執(zhí)法，但決不允許借中央、省級環(huán)保督察、專項督察、執(zhí)法檢查等名義采取一律停工停業(yè)停產(chǎn)的敷衍整改、機械整改、表面整改做法，以免影響企業(yè)正常生產(chǎn)和群眾正常生活。要聚焦交辦問題深入抓好整改，舉一反三全面排查整治，嚴禁對督查交辦的問題，不調(diào)查、不研究、不治理，而采取“一停了之”“以停代治”“不聞不問”的“障眼法”或“常停久治”“久治不驗”等“拖延術(shù)”，嚴禁應(yīng)付督察檢查搞“一刀切”，堅決避免集中停工停業(yè)停產(chǎn)等簡單粗暴行為。
  四、保障措施
  (一)突出黨委、政府主體責(zé)任。各級黨委、政府要全面落實生態(tài)環(huán)境保護“黨政同責(zé)”“一崗雙責(zé)”主體責(zé)任，按照“屬地管理”和“管發(fā)展的管環(huán)保、管生產(chǎn)的管環(huán)保、管行業(yè)的管環(huán)保”要求，加強對本行政區(qū)域或分管行業(yè)領(lǐng)域內(nèi)污染治理工作的組織領(lǐng)導(dǎo)和科學(xué)統(tǒng)籌，要深入基層、深入實際調(diào)查研究，精細制定差異化管控措施，分類施策、精準(zhǔn)治理，實行清單式管理并向社會公開。要對轄區(qū)內(nèi)或分管行業(yè)領(lǐng)域內(nèi)存在的“一刀切”問題進行全面排查，及時發(fā)現(xiàn)和糾正存在的問題。要強化環(huán)保、質(zhì)量、技術(shù)、能耗、安全等標(biāo)準(zhǔn)倒逼，加大財稅和金融政策扶持力度，突出環(huán)保引領(lǐng)，實現(xiàn)轉(zhuǎn)型提升，推動綠色發(fā)展。
  (二)強化部門監(jiān)管責(zé)任。有關(guān)職能部門要加強對分管領(lǐng)域工作的調(diào)查研究和監(jiān)督管理，堅決杜絕通過“發(fā)通知、打招呼”等臨時性“一刀切”關(guān)停方式，堅決反對生態(tài)環(huán)境保護領(lǐng)域的“一刀切”等形式主義、官僚主義問題，堅決反對生態(tài)環(huán)境問題的虛假整改、敷衍整改、表面整改，堅決反對“一刀切”粗暴的管控措施，應(yīng)付環(huán)保督察檢查。對有關(guān)職能部門在貫徹落實防止“一刀切”方面工作部署不力、失職瀆職，造成不良影響和后果的，依法依規(guī)予以追責(zé)問責(zé)。
  (三)嚴格落實企業(yè)治污主體責(zé)任。要進一步提升企業(yè)環(huán)境守法意識，督促加強環(huán)保設(shè)施建設(shè)和運行管理，引導(dǎo)企業(yè)開展深度治理和提標(biāo)改造，切實減少污染排放。對弄虛作假、違法生產(chǎn)、偷排偷放、超標(biāo)排放、無證排污等違法違規(guī)行為，要一以貫之地保持嚴查重處的高壓態(tài)勢，一經(jīng)發(fā)現(xiàn)，一律依法依規(guī)嚴肅查處。