In China, the production of security doors up to 2000 companies, this number has not been coupled with unregistered underground factory; therefore, firm size and product quality, often appear uneven situation. Recently, the national quality supervision departments to carry out sampling and found security doors, security doors, family- producing small businesses, and 70% of products fail to meet the situation. Final analysis , mainly a lot of small manufacturers , the use of shoddy work practices to reduce production costs , to achieve some consumer demand in the price , so that the security door on the market price disparities , ranging from 400 to 2000 . There H.264/AVC SVC manufacturers use consumer awareness of security doors are not familiar with the name of security doors opening and closing, renamed the “entrance door " or " protective door “and so on.

　　

　　Based on 2007 industry standards, security doors , security doors must be left at the door , annotation has a security level ( A , B , C, D , special ) security door of the text, and have Arial gravure form permanently fixed in the chain corner edge angle , with a height of 1.6 meters ground , plus or minus 10 mm position. Meanwhile, the new standard for the security door of non-normal opening time, extending the length of the bolt and locking points are also relevant requirements.