Industrial damage detection door is an important type of lead door, which can prevent the entry of radiation. It can play a good role in radiation protection because of the following structural characteristics. The door leaf is made of aluminum alloy frame structure. The surface of the door is made of drawing stainless steel panel or high-quality aluminum alloy panel with high-voltage electrostatic spraying. The internal sandwich adopts injection type polyurethane foam technology, and the door panel is solid, flat and elegant.

门边框包边材料选用SUS304不锈钢，门扇四周折边处无应力连接，坚固耐用。门扇四周镶嵌封条，配以特殊设计加工的门扇运行轨道使安装完成的门扇运行平稳，气密性好。采用大直径耐磨滑轮，大大降低了运行噪音，延长使用寿命。门体双层玻璃观察窗，便于观察室内工作状态。机箱采用特制铝合金型材，强度高，表面阳极氧化处理使其美观、耐磨独特的吊具设计，气密性调节更方便简接。

SUS304 stainless steel is used as the binding material of door frame, and there is no stress connection around the folding edge of the door leaf, which is firm and durable. The door leaf is inlaid with high-quality seals, and the door leaf running track with special design and processing makes the installed door leaf run smoothly and has good air tightness. The use of large diameter wear-resistant pulley greatly reduces the running noise and prolongs the service life. The door body double glass observation window is convenient to observe the indoor working state. The chassis is made of special aluminum alloy profile with high strength and surface anodizing treatment, which makes it beautiful, wear-resistant, unique sling design, air tightness adjustment is more convenient and simple to connect.

同一厚度的同一种防护材料的铅当量并不是固定不变的，有些防护材料的铅当量是随着使用的 X射线峰值管电压而变化的。对含铅的防护材料和用品，铅当量随使用的 X射线峰值电压变化不大，但铅对X射线峰值管电压介于 40.0~88.0ke V 之间的电离辐射存在一个铅的“弱吸收区”;而对非含铅的防护材料和用品，铅当量随使用的 X射线峰值电压变化较大，对同一种防护材料的 X射线防护服铅当量的测试，应在一定范围内不同的管电压下测试其铅当量值，其测试值应不少于 5个，以更小值确定防护材料铅当量等级。

The lead equivalent of the same protective material with the same thickness is not fixed. The lead equivalent of some protective materials varies with the applied peak X-ray tube voltage. For protective materials and articles containing lead, the lead equivalent does not change with the peak voltage of X-ray, but there is a "weak absorption zone" for ionizing radiation with X-ray peak tube voltage between 40.0 and 88.0 keV; For the protective materials and articles without lead, the lead equivalent varies greatly with the peak voltage of X-ray used. For the lead equivalent test of X-ray protective clothing of the same protective material, the lead equivalent value should be tested under different tube voltages within a certain range, and the test values should not be less than 5. The minimum value should be used to determine the lead equivalent grade of protective materials.

新版GB 16757 《X 射线防护服》标准修订版要求防护服后片的铅当量由原标准0.25 mmPb调整为(0.15～0.25)mmPb，因为操作人员背部所受的散射线的反射线辐射，强度比前部弱得多;另外，前部和背部距照射野的距离也不同，例如，站在受检者旁注射造影剂的工作人员，从距离照射野10 cm 处移30 cm 处就可使其所受照射量减少十分之一。X 射线防护服并不是铅当量越大越好，应符合辐射防护的化原则，铅当量(0.15～0.25)mmPb可满足防护要求，并可减轻负重。

The revised version of GB 16757 "X-ray protective clothing" requires that the lead equivalent of the back piece of protective clothing should be adjusted from 0.25 MMPB to (0.15-0.25) MMPB, because the reflected radiation of scattering line on the back of operators is much weaker than that on the front; In addition, the distance from the front and back to the radiation field is also different. For example, for the staff who stand beside the subject and inject contrast medium, the exposure can be reduced by one tenth when the distance from the radiation field is 10 cm to 30 cm. X-ray protective clothing does not mean that the larger the lead equivalent, the better. It should conform to the optimization principle of radiation protection. The lead equivalent (0.15 ~ 0.25) MMPB can meet the protection requirements and reduce the load.

工业探伤门是在铅门的基础上进行的不断地进行射线防护的产品的，对于防辐射的产品来说要不断地进行提升它的防辐射的质量，对于防辐射来说是比较关键的，随着大规模的城市改造和房地产开发，现在的生活的节奏是日益加快的，各种的手机和电脑也是不断地进行充斥着我们的生活的，辐射是一些原来建于城市周边的传输发射和高压线等设施周围也开始进行开发建设，小区环境和室内环境中的电磁辐射污染问题也就随之而来，必须要进行防辐射的处理。

The industrial damage detection door is based on the lead door, which continuously carries out radiation protection products. For radiation protection products, it is necessary to continuously improve its radiation protection quality, which is more critical for radiation protection. With the large-scale urban transformation and real estate development, the pace of life is accelerating, and various mobile phones and computers are also constantly improving We are full of our life, radiation is some of the original built around the city transmission center and high-voltage lines and other facilities around the start of development and construction, residential environment and indoor environment of electromagnetic radiation pollution problems will follow, must carry out radiation prevention treatment.