聚氨酯保溫管注意事項
Cautions for Polyurethane Insulation Pipe
1.一定要真實了解供熱管道直埋敷設方式分為有彌補直埋敷設及無補償直埋敷設兩種方式，規(guī)劃和施工中。的確把握兩種方式各自的作業(yè)原理，特點及其運用場所，以便在規(guī)劃上合理選用，施工上、可靠、經(jīng)濟。
1. We must really understand that the direct burial laying of heating pipelines can be divided into two types: compensated direct burial laying and uncompensated direct burial laying, which are planned and constructed. Indeed, we should grasp the operating principles, characteristics and application sites of the two modes so as to make rational selection in planning and safe, reliable and economical construction.
2.進場后仔細進行檢驗，施工前必需對出產(chǎn)預制直埋保溫管的廠家進行調(diào)研。對不合格的保溫管拒絕運用。
2. Careful inspection after entering the site. Before construction, it is necessary to investigate the manufacturer of prefabricated direct-buried insulating pipes. Refuse to use unqualified heat preservation tubes.
3.聚氨酯保溫管焊接是一項保證工程質(zhì)量的關鍵作業(yè)，在預制直埋管道施工中。
3. Polyurethane insulation pipe welding is a key operation to ensure the quality of the project, which is in the construction of prefabricated directly buried pipelines.
4.各種井室的施工質(zhì)量直接影響工程質(zhì)量和管道的運用壽命，固定支架。如井室防水欠好，將使部件因浸水遭到損壞。因此，應仔細施工，保證施工質(zhì)量。
4. The construction quality of various wellbores directly affects the engineering quality and the service life of pipelines, and fixes the brackets. If the waterproofing of the well chamber is not good, the parts will be damaged by immersion. Therefore, careful construction should be carried out to ensure the quality of construction.
5.滿意鎮(zhèn)壓條件下，必需注重預制直埋保溫管道的鎮(zhèn)壓。進行灌水排凈空氣，然后分兩步做：穩(wěn)壓10分內(nèi)無滲漏。強度實驗：把管道內(nèi)的壓力升作業(yè)壓力的1.5倍后；用1kg小錘在焊縫周圍對焊縫逐個進行敲打檢查，嚴密性實驗：把管內(nèi)的壓力降作業(yè)壓力時，30分鐘無滲漏且壓力降不超越0.2個大氣壓即為合格；應按標準要求做好試壓記載。
5. Under satisfactory suppression conditions, attention must be paid to the suppression of prefabricated directly buried insulation pipelines. Firstly, the water is irrigated to drain the clean air, and then it is done in two steps: no leakage within 10 minutes of voltage stabilization. Strength test: after raising the pressure in the pipeline to 1.5 times of the working pressure; knock the welds around the weld with a 1 kg hammer one by one, tightness test: when the pressure in the pipeline is reduced to the working pressure, 30 minutes without leakage and pressure drop not exceeding 0.2 atmospheric pressure is qualified; pressure test records should be made according to the standard requirements.
6.因預制直埋保溫管埋于地下，工程檢驗。絕大部分屬于蔭蔽工程，如果竣工檢驗不仔細，竣工資料不具體，將會影響今后的運用。
6. Because the prefabricated directly buried insulating pipe is buried underground, engineering inspection. Most of them belong to shade works. If the completion inspection is not careful and the completion data are not specific, it will affect the future application.
7.接頭，回填土應在管道試壓。竣工測量，清掃結束后方可進行，且必需按聚氨酯保溫管施工特點回填規(guī)則厚度砂子，千萬不行偷工減料
7. Joint, backfill should be tested in pipeline. Completion survey can only be carried out after cleaning, and must be backfilled with regular thickness sand according to the construction characteristics of polyurethane insulating pipe. No Jerry work or material reduction is allowed.
8.必需引起足夠注重。預制直埋保溫管現(xiàn)場接頭保溫須在試壓合格后方可進行，現(xiàn)場接頭保溫施工。這一項內(nèi)容是預制直埋保溫管道施工特有的施工質(zhì)量好壞直接影響運用壽命。保溫層有現(xiàn)場發(fā)泡施工和保溫瓦施工兩種辦法，不管選用哪種辦法施工，都不能出現(xiàn)環(huán)形空間，開裂、脫層等缺陷，保護層的做法有多種(如高密度聚乙烯和玻璃鋼保護層)但都必須保證接頭的整體性，嚴密性，防水性。聚氨酯保溫管起發(fā)速度慢此現(xiàn)象一般出現(xiàn)在秋冬時節(jié)或早晨施工，因為氣溫俄然下降或氣溫低所造成的。
8. Attention must be paid to it. The field joint insulation of prefabricated directly buried insulating pipe must be carried out after qualified pressure test, and the field joint insulation construction. This content is that the construction quality of prefabricated directly buried insulation pipeline has a direct impact on its service life. There are two ways to construct insulation layer: foaming construction on site and insulation tile construction. No matter which method is chosen, there are no defects such as annular space, cracking and delamination. There are many ways of protecting layer (such as high density polyethylene and fiberglass reinforced plastic protective layer), but the integrity, tightness and waterproof of of joint must be guaranteed. The slow starting speed of polyurethane insulating pipes usually occurs in autumn and winter or in the morning construction, because the temperature suddenly drops or the temperature is low.
This article is provided by Shandong Hipper Pipe Technology Development Co., Ltd. To learn more about polyurethane insulation pipe manufacturers, please pay attention to our website: http://www.qndr49.cn Thank you!
