How to select steel fire door correctly

The steel fireproof door is made of cold-rolled steel plate or galvanized plate, color plate, stainless steel plate, etc., which is formed by cold processing, and then assembled through the combination of welding, internal seaming, riveting, adhesive and other processes after surface treatment such as pickling and phosphating. How to choose steel fire door?

The door frame shall be inlaid with special fireproof swelling sealant strip, and the door surface shall be sprayed with fireproof paint and antirust paint. The door surface shall be sprayed with plastic and wood grain transfer according to the requirements. Fire resistant glass of corresponding grade can also be configured according to requirements.

The fire resistance rating of steel fire door is an important condition for evaluating the quality. According to the different uses of fire doors, the required fire rating needs to be carefully considered.

The higher the level, the stronger the ability of fire prevention. It is used in places with strict fire prevention requirements. The performance of steel fire door shall meet the standard requirements. The fire resistance time of Class A fire door shall not be less than 1.5 hours, that of Class B fire door shall not be less than 1.0 hours, and that of Class C fire door shall not be less than 0.5 hours. The steel fireproof door is not only fireproof but also anti-theft when used outdoors. Steel fireproof doors have different specifications and dimensions.

According to the national standard GB12955-2008 Fire Doors, Chongqing fire doors can be divided into four parts: wood fire doors, steel fire doors, steel wood fire doors and fire rolling shutter doors. According to the grade, except that the fireproof rolling shutter door is super grade, others are divided into three grades: A, B and C.

How to identify the quality of fire doors and whether they are qualified fire doors? Simple methods include the following:

1、 Check the weight of fire door

The interior of the fire door is filled with expanded perlite, so its weight is heavier than that of ordinary solid wood doors or anti-theft doors.

2、 Check Chen

Fireproof doors are products requiring type approval. Regular manufacturers of fireproof doors will provide inspection reports and type approval certificates of fireproof doors.

3、 Look at the appearance

The surface of wooden fireproof door shall be polished or sanded; No gouging marks, burrs and hammer marks; Corner cutting and butt joint shall be tight and flat. The steel fireproof door is welded robustly and the welding spots are evenly distributed; The outer surface shall be sprayed with smooth lubrication.