1) Tube diameters/wall thickness
管径/壁厚
2) pipes with small diameter and large wall-thickness
小径厚壁管
1.
Before installation,it has been discovered that the boiler water-wall pipes with small diameter and large wall-thickness of ultra-supercritical units in second-phase project for Huaneng Yuhuan Power Plant have comparatively serious unfused weld-joint defects,needing to carry out a large amount of inspection.
华能玉环电厂二期超超临界机组锅炉水冷壁小径厚壁管安装前发现焊缝存在较严重的未熔合缺陷,需进行大量检测。
3) Small-sized heavy-wall steel tube
小直径厚壁钢管
4) large-diameter thick-walled pipeline
大口径厚壁管道
5) Steel tube O. D. and W. T
钢管外径和壁厚
6) small-diameter and thick-wall pipe
小口径厚壁管
1.
The results show that with the advantages of large inspection range and high sensitivity,the γ-ray radiography is suitable for small-diameter and thick-wall pipes.
将γ射线透照工艺用于锅炉高温过热器安装焊口的探伤,并与X射线透照工艺对比,试验结果表明:对小口径厚壁管焊口采用γ射线透照具有检出范围大,灵敏度符合要求,缺陷检出率高等优点。
补充资料：凹模壁厚及凹模垫板尺寸
型腔壁部投影面积 壁 厚， 毫 米
F， 厘米2 h1 h2 h3 h4 h5
<5 15~20 30~40 <=10 15~20 30~40
>5~10 20~25 40~50 10~15 20~25 40~55
>10~50 20~30 50~60 15~20 20~30 55~65
>50~100 30~35 60~75 20~25 30~40 65~70
>100~200 35~40 75~85 25~30 40~50 70~75
>200 >40 >85 30~35 50~60 >80
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条