拱顶冷热熔盐储罐焊接施工焊接检验规定.doc

拱顶冷热熔盐储罐焊接施工焊接检验规定 10 Welding inspection10.1 焊缝外观质量检验 10.1 Weld quality visual inspection10.1.1焊接检查前，焊工将熔渣、飞溅处理干净；焊缝表面及热影响区，不得有裂纹、气孔、夹渣、弧坑和未焊满等缺陷；成型要良好，焊缝与母材应圆滑过渡，焊角高度符合设计规定，对接焊缝宽度盖过每边盖过坡口1-2mm为宜10.1.1Prior to checking the welding, the welder should clear the slags and the splashes; the cracks, air-vents, slag inclusions, craters, incompletely filled welding and other defects are not allowed to appear on the surface of the welding seams and the heat affected zone; the formation should be fine, the welding seams and the parent materials should be in rounding off, the fillet height should be in accordance with the design specifications, and the width of the butt welds should exceed the groove at each edge about 1 – 2mm.10.1.2对接焊缝的咬边深度不得大于0.5mm，咬边的连续长度不得大于100mm，焊缝两侧咬边总长度不超过该焊缝总长度的10%；10.1.2The undercut depth of butt welds is not allowed to exceed 0.5mm, the consecutive length of undercut is not allowed to exceed 100mm, and the total undercut length at both sides of welding seams cannot exceed the 10% of the total length of this welding seam.10.1.3底圈壁板与边缘板的T型接头罐内角焊缝应符合设计要求。

10.1.3The shell at the bottom ring and the T joint tank inner angle welding seam of the edge plate shall conform to the design requirements.10.1.4罐壁纵向对接焊缝不得有低于母材表面的凹陷；罐壁环缝和罐底对接焊缝低于母材表面的凹陷深度不得大于0.4mm，凹陷的连续长度不得大于100mm，凹陷的总长度，不得大于该焊缝长度的10%底圈罐壁板纵焊缝、边缘板对接焊缝不允许存在咬边10.1.4The vertical butt welds of the tank wall should not be lower than the hollow of the parent material surface; the circumferential seam weld of the tank wall and the butt welds at the tank bottom cannot shall not be lower larger than 0.5mm of the hollow depth of the parent surface, the consecutive length of hollow cannot shall not exceed 100mm and the total length of hollow cannot exceed 10% of the welding seam length.10.1.5对接焊缝的余高，应符合下表规定：10.1.5Reinforcement of butt weld shall conform to the stipulation of below table:a.对接焊缝余高不大于1mm。

a.Reinforcement of butt weldb.焊缝的宽度应按坡口宽度两侧各增加1～2mm确定；b.Width of the weld shall be determined as per both sides of the bevel width increase 1～2mm respectively;10.2 焊缝无损检测 10.2 NDT and tightness test of weld 10.2.1从事储罐焊缝无损检测的人员，必须具有国家有关部门颁发的并与其工作相适应的资格证书10.2.1The personnel engaged in non-destructive testing must hold the qualification certificates that are issued by national authorities and are in terms of related jobs.10.2.2边缘板的对接焊缝应进行渗透检测，且对接焊缝的外端300mm进行射线检测10.2.2 the butt weld of the edge plate should be tested for penetration, and the outer end of the butt weld shall be tested for X-ray.10.2.3罐底板丁字焊缝的打底焊缝焊接完成后进行渗透检查，沿丁字焊缝三个方向各检测200mm。

10.2.3 the penetration inspection after the welding of the bottom plate of the bottom plate of the bottom plate of the bottom plate shall be checked for 200mm in three directions.10.2.4罐底板所有焊缝均进行100%超声和100%渗透检测10.2.4 Tank Bottom All welds are 100% Ultrasonic and 100% Penetrant.10.2.5罐壁焊缝的无损检测：10.2.5 Nondestructive testing of welds in tank walls:10.2.5.1壁厚≥25mm的纵向焊缝应进行100%的射线检测；10.2.5.1 longitudinal welds with wall thickness ≥25mm shall be tested for 100%10.2.5.2底圈罐壁42（44）mm*67mm对接焊缝、42（44）mm*34mm环向焊缝、34mm*25mm环向焊缝100%RT检测。

10.2.5.2 Bottom circle wall 42 (44) mm * 67mm butt weld, 42 (44) mm * 34mm circumferential weld, 34mm * 25mm circumferential weld 100% RT detection.10.2.5.3罐壁所有丁字焊缝100%RT检测，检测区域为三个方向各300mm10.2.5.3 Tank wall All T-welds are 100% RT tested and the detection area is 300mm in three directions.10.2.5.4罐底所有焊缝均采用真空箱法进行严密性试验10.2.5.4 All welds at the bottom of the tank are subjected to tightness tests using a vacuum box method.10.2.5.5 25mm*16mm、16*10mm环向焊缝每一焊工在最初3m焊缝任意部位取300mm进行RT检测，后续每种板厚60m焊缝及其尾数内的任意部位取300mm进行射线检测，检测部位不含丁字焊缝。

10.2.5.5 25mm * 16mm, 16 * 10mm ring weld Each welder in the initial 3m weld any part of the 300mm for RT detection, follow the thickness of each 60m weld and the tail of any part of the 300mm to take the radiation test , The detection site does not contain T-weld.10.2.5.6 10mm、16mm纵焊缝，每一焊工在最初3m焊缝任意部位取300mm进行RT检测，后续每种板厚30m焊缝及其尾数内的任意部位取300mm进行射线检测，检测部位不含丁字焊缝10.2.5.6 10mm, 16mm vertical weld, each welder in the initial 3m weld anywhere 300mm for RT detection, follow the thickness of each 30m weld and the tail of any part of the 300mm to take the radiation test, the detection site is not With T-shaped welds.10.2.5.7罐壁的所有焊缝均进行100%渗透检测。

10.2.5.7 All welds in the tank wall are 100% permeable.10.2.5.8射线货超声检测不合格时，应在该检测长度的两端延伸300mm做补充检测，但缺陷的部位距离底片端部75mm以上者不再延伸如延伸部位检测仍不合格，应继续延伸检查当某一焊工所焊接的焊缝射线检测出现多处不合格时，应对焊工所完结的焊缝100%检测10.2.5.8 Radiation inspection Ultrasonic testing failure, should be extended at both ends of the detection length of 300mm to do the supplementary test, but the defective part of the end of the film 75mm or more no longer extend. If the extension of the detection is still not qualified, should continue to extend the inspection. When a welder welds the welds to detect multiple nonconformities, welders should be finished 100% of the weld inspection.10.2.5.9底板大角焊缝初层焊缝焊完后，应进行渗透检测；全部焊完后进行渗。