专注通风管道加工·排烟罩

　　1、管子下料

1. Pipe cutting

　　⑴、下料应严格按设计单线图进行，切割前材料尺寸应仔细核对。

⑴. Cutting should be strictly carried out according to the design single line diagram, and the material size should be carefully checked before cutting.

　　⑵、下料时应根据管子长短合理排料，减少浪费。

When cutting, the material should be reasonably arranged according to the length of the pipe to reduce waste.

　　2、坡口制备要求

2. Requirements for groove preparation

　　管道连接主要是焊接方式，坡口是焊接的首要条件，必须按规范规定进行，中、低压管道坡口型式采用V型，高压管道采用YV(双V)型坡口，坡口加工应平整，不得有裂纹、重皮、毛刺和氧化铁等。

The main method of pipeline connection is welding, and the groove is the primary condition for welding, which must be carried out in accordance with the specifications. The groove type for medium and low pressure pipelines is V-shaped, and the YV (double V) groove type is used for high pressure pipelines. The groove processing should be flat, without cracks, double skin, burrs, and iron oxide.

　　3、焊口组对

3. Welding joint assembly

　　管道组对前，将接口内外表面25毫米范围内的泥垢，油污、铁锈等干净，用钢丝刷或拖布将管内杂物。对预制和安装时未封闭的管段，应采取措施封堵管口，避免杂物进入管道内。

Before assembling the pipeline, remove any dirt, oil stains, rust, etc. within a range of 25mm on the inner and outer surfaces of the interface, and use a wire brush or mop to remove any debris inside the pipeline. Measures should be taken to seal the pipe openings of unsealed sections during prefabrication and installation to prevent debris from entering the pipeline.

　　4、预制允许偏差

4. Prefabrication allowable deviation

　　5、管道预制件应按规定要求编号(管线号、焊口编号和焊工号)以便于质量控制和安装时查找。

5. Prefabricated pipeline components should be numbered according to the specified requirements (pipe line number, weld joint number, and welder number) for quality control and easy retrieval during installation.

　　6、预制完毕的管段，应将内部清理干净，并及时封闭管口，保证管内清洁。特别指出，本工程所有管口在安装前必须全部封闭，确保预制管道进入现场封堵。

6. The prefabricated pipe section should be cleaned internally and the pipe opening should be closed in a timely manner to ensure cleanliness inside the pipe. It is particularly pointed out that all pipe openings in this project must be completely sealed before installation to ensure that prefabricated pipes enter the site for sealing.

　　7、等厚管道对接焊口的组对应做到内壁齐平

7. Ensure that the assembly of equal thickness pipeline butt welds is flush with the inner wall

　　8、不等厚管道组成件组对时,当内壁错边量超过1.5毫米或外壁错边量超过3毫米

8. When assembling components of unequal thickness pipelines, when the misalignment of the inner wall exceeds 1.5 millimeters or the misalignment of the outer wall exceeds 3 millimeters

　　9、相邻焊口间距要求

9. Requirements for the spacing between adjacent weld joints

　　纵焊缝近点间距应大于等于5倍管子壁厚;

The distance between adjacent points of longitudinal welds should be greater than or equal to 5 times the wall thickness of the pipe;

　　支管开孔距主管环焊缝或纵焊缝的近点间距不小于3倍主管壁厚。

The distance between the opening of the branch pipe and the circumferential or longitudinal weld seam of the main pipe shall not be less than 3 times the wall thickness of the main pipe.

　　10、当耳柱、支架焊接在管子上时，支架或耳柱焊口不应穿越管子或管件焊口。

10. When the ear pillar or bracket is welded to the pipe, the bracket or ear pillar weld should not pass through the pipe or fitting weld.

　　11、焊接组对时的点固焊及固定卡具焊缝的焊接，要求同正式焊接。

11. The requirements for spot welding and welding of fixed fixture welds during welding assembly are the same as those for formal welding.

　　12、拆除固定卡具时，禁止用榔头直接敲掉，应用砂轮机或气焊火焰去掉，火焰切割于焊缝外层。与母材接触部分用砂轮机打磨去除，若有缺陷应作渗透检验合格后修复。

12. When dismantling fixed fixtures, it is prohibited to directly knock them off with a hammer. They should be removed using a grinder or gas welding flame, and flame cutting is limited to the outer layer of the weld seam. The part in contact with the base material should be removed by grinding with a grinder. If there are defects, they should be repaired after passing the penetration inspection.

　　13、焊缝表面不得有裂纹、焊缝不得有未熔合、根部未焊透等缺陷。

13. There should be no cracks on the surface of the weld seam, and there should be no defects such as incomplete fusion or incomplete penetration at the root of the weld seam.

　　14、焊接完成后应及时焊缝表面的渣皮，飞溅，并对管道焊缝表面质量进行自检。

14. After welding is completed, the slag and spatter on the surface of the weld seam should be removed in a timely manner, and the surface quality of the pipeline weld seam should be self inspected.

　　15、不锈钢风管、配件焊接接头焊后应进行酸洗与钝化处理，用不锈钢专用酸洗钝化液(膏)处理不锈钢接头表面，焊接时产生的氧化物。

15. After welding, stainless steel ducts and fittings should undergo acid pickling and passivation treatment. The surface of stainless steel joints should be treated with stainless steel specific acid pickling passivation solution (paste) to remove oxides generated during welding.

以上就是有关：山东通风管道加工 的介绍，想了解更多的内容请点击：http://www.jnqsg.com 我们将会全心全意为您提供满分服务，欢迎您的来电！

The above is an introduction to Shandong ventilation duct processing. For more information, please click: http://www.jnqsg.com We will wholeheartedly provide you with full score service. Welcome to call us!

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