【 Weak current College 】 wooden fire doors in the detection of quality issues

Fire doors is a time to meet fire resistance stability and integrity of fire compartmentation, it has the function of ordinary doors, fire, smoke, blocking high temperature special functionality. Fire door is divided into wooden fire doors and steel fire doors are highlighting wooden fire door.

1. wood fire door of the relevant technical standards

1. the composition of wooden fire doors.

According to the wooden fire door product standards of the wooden fire door General technical conditions "(GB14101-93), fire doors, door frames, the door leaf skeleton, panels, heat insulation material in fill, fire hardware accessories, etc. Depending on your needs, you can also install A door leaf compound fireproof glass door leaf and door frame and above there is A class of composite fire resistant glass composition of bright Windows.

2. classification of wooden fire doors.

Wooden fire door by shape divided into single-leaf fireproof doors, fire doors with double fan, single side-band glass fireproof doors, double doors with glass fireproof door, single side-band lit Windows fire doors, double doors with bright Windows single-leaf fireproof doors, with bright window with glass fireproof door, double door with glass fireproof door with bright window eight types; press the fire resistance is divided into class a, class b, c three categories, requirements for fire resistance time 0.9h 1.2h, respectively, 0.6h.

3. wood fire door's performance.

In fire resistance test, wooden fire door should be in the fire resistance performance of the required time to satisfy the conditions laid down in standards: first integrity cannot be destroyed, namely: ① back fire surface is not continuous flame over 10s; ② at its back fire surface to cracks, holes or other porous without flame, nor can it be from these pores 20 ~ 30mm distance of combustibles in 10 ~ 30s ignition; ③ samples within cannot occur across the collapse. Second, can not lose fireproof, namely: wooden fire door should average temperature measuring point, the temperature must not exceed 140 ° c or any point temperature rise shall not exceed 180 ° c, otherwise, that is, the loss of his heat insulation.

In recent years, due to production, sales, use, and other areas there are acts of unfair competition, market and lack of functional supervision, resulting in the fire door product quality not protected, many fire accident, since the fire door does not play, resulting in the spread of fire, lessons are especially enlargement. Our wooden fire door detection process recognizes that there is more of a quality problem. We combine testing practical for wooden fire door quality problems for the following discussion.

Second, the wooden fire doors exist quality problems

1, product without national fire product quality supervision and inspection center authentication (authorization).

Current market many fire door no type approval (approval), as the "three free" product. Some borrowed from other units of type approval (approval), illegal production, sale and use: some units even ordinary door instead of fire door for production, distribution and use.

2, product appearance is not consistent with the standard requirements.

Checked the unqualified wooden fire door parts not product marking, quality inspection and certification (certified) qualified flag. Product appearance is incomplete, damaged, not bare surface, cutting marks, burrs, hammer, corner cutting slot not tight, flat, etc.

3, product specifications and dimensions are not up to standards.

Checked the unqualified wooden fire door most recognized certificates on callout size is inconsistent, mainly the "square". The "small" refers to the door leaf thickness for the width of the side walls and doors of small, small, small, the thickness of fire protection glass fireproof door overall weight small: "second" refers to the fire door dimensions, fireproof glass dimensions.

4. door leaf structure and fill material is not up to standard.

Inspection time wooden fire door breaking found that door leaf structure and fill material and type approval certificate does not match the description, such as panels, fire board thickness is small, no alternate stalls, filling material is not eligible. Performance is particularly striking is the internal padding material.

5, refractory metal parts does not meet standard requirements.

Many applications in wooden fire door hardware fittings, no type approval certificates and test reports, and even installation in fire door hardware fittings for ordinary accessories, fundamental to fire resistance requirements.

6, fireproof glass does not meet the standards.

Some wooden fire door installation of fire resistant glass inspection report, no qualified, thickness up to requirements, some will fire resistance for the installation of fire resistant glass 0.6h in class a fire door, even ordinary glass fireproof glass replacement.

7, fire doors, fire-proof seal.

Current market many unqualified fire door fire sealing strip is not set, or the seal is not straight, the bow, there is no national testing bodies issued by a qualified inspection report. Some common wood line replacement fire sealing strip, when fire occurs not only not expansive plugging pores, even affect fire door of fire, smoke and heat insulation.

For these reasons, staff should fire detection, be found, to rectify and to product quality supervision enterprises and on problems.