聚氨酯保温管注意事项
Cautions for Polyurethane Insulation Pipe
1.一定要真实了解供热管道直埋敷设方式分为有弥补直埋敷设及无补偿直埋敷设两种方式，规划和施工中。的确把握两种方式各自的作业原理，特点及其运用场所，以便在规划上合理选用，施工上、可靠、经济。
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.进场后仔细进行检验，施工前必需对出产预制直埋保温管的厂家进行调研。对不合格的保温管拒绝运用。
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.聚氨酯保温管焊接是一项保证工程质量的关键作业，在预制直埋管道施工中。
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.各种井室的施工质量直接影响工程质量和管道的运用寿命，固定支架。如井室防水欠好，将使部件因浸水遭到损坏。因此，应仔细施工，保证施工质量。
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.满意镇压条件下，必需注重预制直埋保温管道的镇压。进行灌水排净空气，然后分两步做：稳压10分内无渗漏。强度实验：把管道内的压力升作业压力的1.5倍后；用1kg小锤在焊缝周围对焊缝逐个进行敲打检查，严密性实验：把管内的压力降作业压力时，30分钟无渗漏且压力降不超越0.2个大气压即为合格；应按标准要求做好试压记载。
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.因预制直埋保温管埋于地下，工程检验。绝大部分属于荫蔽工程，如果竣工检验不仔细，竣工资料不具体，将会影响今后的运用。
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.接头，回填土应在管道试压。竣工测量，清扫结束后方可进行，且必需按聚氨酯保温管施工特点回填规则厚度砂子，千万不行偷工减料
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.必需引起足够注重。预制直埋保温管现场接头保温须在试压合格后方可进行，现场接头保温施工。这一项内容是预制直埋保温管道施工特有的施工质量好坏直接影响运用寿命。保温层有现场发泡施工和保温瓦施工两种办法，不管选用哪种办法施工，都不能出现环形空间，开裂、脱层等缺陷，保护层的做法有多种(如高密度聚乙烯和玻璃钢保护层)但都必须保证接头的整体性，严密性，防水性。聚氨酯保温管起发速度慢此现象一般出现在秋冬时节或早晨施工，因为气温俄然下降或气温低所造成的。
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.sdhpgy.com Thank you!
