Explosion-proof lighting installation acceptance standards
Waterproofing tapes
The XUNDA-T 500 Waterproofing tapes series is cold applied tape for both metallic pipelines and waterproofing works against outdoor bad weathers .
The PP Bitumen Tape shall be applied after the Liquid adhesive by hand or with a wrapping machine.
Structures
The specification of the tape consists of three layers,
Adhesive layer: Butyl rubber Bituminous Compound
Backing : PP woven fabric cloth
Interleaf:Adhesive Film Treated with Silicone
Features
_ Cold applied
_ Excellent self adhesion to pipe
_ Flexibility provides extra protection at vulnerable areas
_ Excellent conformability and consistent uniform thickness
_ Easily applied with no special equipment
_ Compatible with common pipe coatings
_ Excellent resistance to cathodic disbonding
Physical Properties:Tensile strength and so on , please send email to us
Clear Waterproof Tape, Waterproof Adhesive Tape, Double Sided Waterproof Tape, Water Proof Tape Jining Xunda Pipe Coating Materials Co.,Ltd , http://www.pipe-wrap.com
2. According to the explosion-proof type, it can be divided into 5 types: explosion-proof, increased safety, positive pressure, non-sparking and dust explosion-proof. It can also be combined by other explosion-proof types and the above-mentioned various explosion-proof types or composite type and special type. .
3. According to the type of protection against electric shock can be divided into I, II, III category. The protection against electric shock is to prevent the explosion-proof lamp housing from being easily touched and the parts are electrified, so that the human body is exposed to electric shock or conductors with different potentials to generate electric sparks and ignite the explosive mixture.
AI class—On the basis of basic insulation, accessible conductive parts that are not energized during normal operation are connected to the protective ground conductor in the fixed line.
Class BII - Use double insulation or reinforced insulation as a safety measure without grounding protection.
Class CIII - Use a safe voltage with an effective value of not more than 50V, and no voltage above it will be generated.
Category D0 - only rely on basic insulation as a safety protection measure.
Most of the explosion-proof lamps and lanterns are protected against electric shock and they are Class I and only a few are Type II and Type III lamps. For example: all plastic explosion-proof lamps, explosion-proof flashlight Jane.
4. Classified according to the protection class of the enclosure: In order to protect the dust, solid foreign matter and water from entering the lamp cavity and touching or accumulating on the live parts to cause flashover, short circuit or damage to the electrical insulation, there are a variety of enclosure protection methods to protect the electrical Insulation effect. The characteristic letter “IP†followed by two digits is used to characterize its enclosure protection level. The first number indicates the protection against humans, solid objects or dust. Divided into 0-6 levels. Explosion-proof lamps are sealed lamps. Their dust-proof capacity is at least 4 levels. The second number represents the protection against water and is divided into 0-8 grades.
A. The explosion-proof signs, shell protection grades and temperature groups of the lamps and lanterns are adapted to the explosion hazard environment. When the design is not required, the types of lamps and explosion-proof structures should meet the following requirements:
Types of lamps and types of explosion-proof structures Types of lamps and types of explosion-proof structures B. Lamps are fully furnished, and non-explosion-proof parts must not be used to replace lamp accessories (metal screens, lamp shades, junction boxes, etc.);
C. The installation location of the lamp is away from the source of release, and the lamps are not installed above or below the pressure relief ports and discharge ports of various pipelines;
D. Fixtures and switches are firmly and reliably installed. The number of screwed engagements between the lamp hangers and switches and the junction box is not less than 5 buckles. The threads are smooth, complete, and free of corrosion. The threads are coated with electric composite ester or conductive rust. ester;
E. The switch installation position is easy to operate and the installation height is 1.3m.
