55世纪1、全面的讲应从焊工防护及顺应性练习

55世纪1. In a comprehensive way, welder protection and compliance training should be carried out

55世纪钢结构冬季施工现场焊接应采取哪些措施(1)焊工在低温环境下举行焊接前，需举行低温焊接技能理论教诲和低温焊接顺应性练习。

55世纪What measures should be taken for the welding of steel structure in winter construction site: (1) before welding in low temperature environment, the welder should hold the theoretical teaching of low-temperature welding skills and low-temperature welding compliance practice.

(2)焊工在正式焊接前，必须具备小我私家防寒用品，必须具备较长时间反抗寒冷的本领和防滑本领。

(2) Before welding, the welder must have personal cold protection products, and have the ability to resist the cold for a long time and anti-skid ability.

(3)低温焊接对焊工的小我私家体力耗费较大，倒班时间得当收缩。

(3) Low temperature welding has great physical energy consumption on the welder, and the shift time should be reduced properly.

(4)低温焊接操纵时，应设有专门监护人，钢结构代价对焊工的事情形态举行监控和判定，须要时应接纳相应步伐包管焊接事情的顺遂举行和焊工人身宁静。

55世纪(4) During the operation of low temperature welding, there should be a special guardian. The steel structure cost should monitor and judge the welder's situation. If necessary, it should accept the corresponding steps to ensure the smooth holding of welding matters and the safety of the welder.

(5)下雪气候及雪后举行高空焊接作业时，通道应设专人排除，特殊要打扫薄冰，以包管焊工的宁静通行。

55世纪(5) When high-altitude welding operation is carried out in snowy climate and after snow, special personnel shall be assigned to remove the passageway. In particular, thin ice shall be cleaned to ensure the peaceful passage of welders.

济南彩钢瓦c型钢结构

C-type steel structure of Jinan color steel tile

2、然后是钢结构焊接装备防护

2. Then the steel structure welding equipment protection

(1)焊机只管会合摆放在可挪动的焊机防护棚内，使焊机在正温形态下事情。

(1) The welding machine should be placed in the movable protective shed of the welding machine to make the welding machine work under the normal temperature.

55世纪(2)利用前，气瓶应尽大概会合存放，确保气体随用随有;气瓶在利用时，应安排在焊机棚内，实现正温治理，包管液态气正常气化，使掩护气体稳固通畅。

55世纪(2) Before use, the gas cylinders should be stored together as far as possible to ensure that the gas is available at any time; when the gas cylinders are used, they should be arranged in the welding machine shed to realize the normal temperature control, ensure the normal gasification of liquid gas and make the shielding gas stable and smooth.

55世纪(3)济南彩钢瓦c型钢结构冬季施工接纳打仗式测温仪控制预热温度，情况温度利用平凡温度计监控。

(3) The winter construction of Jinan color steel tile C-type steel structure adopts the war type thermometer to control the preheating temperature, and the ordinary thermometer is used to monitor the temperature.

3、其次焊接质料

3. Secondly, welding materials

55世纪(1)掩护气体应利用纯度为99.9%的CO2气体，以包管焊接讨论的抗裂功能。

55世纪(1) The shielding gas should use CO2 gas with purity of 99.9% to ensure the anti cracking function discussed in welding.

55世纪(2)严厉焊材库的治理，焊条必须按尺度举行烘干，烘干次数不得凌驾两次，在氛围中的袒露时间不得凌驾2h。

(2) Strictly control the welding material warehouse, the welding rod must be dried according to the scale, the drying times shall not exceed two times, and the exposure time in the atmosphere shall not exceed 2 hours.

55世纪(3)焊材库内必须备有脱湿装备，焊材摆放应切合相干划定。

55世纪(3) The welding material warehouse must be equipped with dehumidification equipment, and the welding materials should be placed in accordance with the relevant regulations.

(4)药芯焊丝利用历程中应接纳防潮步伐，焊机上的焊丝防护罩必须保持残缺，未用完的焊丝应实时送回焊材库，防备受潮。

(4) In the course of using flux cored wire, moisture-proof step should be accepted. The protective cover of welding wire on the welding machine must be kept incomplete. The unused welding wire should be sent back to the welding material warehouse in real time to prevent moisture.

4、再有焊接要领及技能步伐

55世纪4. Welding essentials and skills

55世纪(1)预热方法的设定：δ≥30mm，接纳电加热;δ≤25mm，接纳火焰预热。

55世纪(1) Setting of preheating method: when δ ≥ 30mm, electric heating is accepted; when δ ≤ 25mm, flame preheating is accepted.

(2)预热温度接纳火焰加热的次要目标是烤干焊接地区水气，实现正温焊接。烘烤范畴是焊缝双方各50mm范畴，烘烤温度为20～40℃。焊接时需一连施焊。

(2) The secondary goal of preheating temperature receiving flame heating is to dry the moisture in the welding area and realize normal temperature welding. The baking range is 50 mm on both sides of the weld, and the baking temperature is 20-40 ℃. Continuous welding is required during welding.

(3)在拘束度大的环境下，预热温度应进步15～30℃。没有特别阐明时，实行上述划定。

55世纪(3) The preheating temperature should be improved by 15 ~ 30 ℃ under the condition of high restraint. If there is no special explanation, the above-mentioned delimitation shall be implemented.

(4)差别板厚对接，预热温度应实行板厚较厚的钢板预热温度。

55世纪(4) For butt joint of different plate thickness, the preheating temperature of thicker plate shall be adopted.

5、焊接情况详细划定

5. Detailed delimitation of welding conditions

(1)低温焊接情况温度范畴为0～-5℃，低于-5℃，需制止焊接作业。天天应选择情况温度大于0℃举行焊接作业。

55世纪(1) In the case of low temperature welding, the temperature range is 0 ～ - 5 ℃, below - 5 ℃, it is necessary to stop welding operation. Welding operation should be carried out every day when the temperature is higher than 0 ℃.

55世纪(2)低温焊接时需搭设防风安装。

55世纪(2) Wind proof installation is required for low temperature welding.

(3)高空焊接作业时，防风安装应精密保温，特殊是防风棚底部应密实，防备沿焊道构成穿堂风，雨水、雪花严禁飘落在火热的焊缝上。

55世纪(3) During high-altitude welding operation, wind proof installation should be precise and thermal insulation, especially the bottom of the windbreak shed should be dense to prevent the formation of ventilation along the weld bead. Rain and snow are not allowed to fall on the hot weld.

(4)雪天及雪后举行作业时，应接纳火焰对焊接地区举行除湿处置惩罚。

55世纪(4) In case of operation in snowy days and after snow, the flame shall be accepted to dehumidify the welding area.