Q:The water heater for what the security hole tube

Asbestos exposure to the skin for a long time, harmful to the skin, eating into the body harmful. Pack on the exhaust pipe, do not move it, there is no harm.

Q:How can the exhaust pipe of a gas water heater be insulated by going through the glass?

Gas water heater exhaust pipe are now dual structure: the inner tube is the exhaust pipe, the fan will strong combustion exhaust water heater forcibly discharges the indoor air inlet pipe; the outer tube is, the outer air (oxygen) gas suction water heater for combustion.

Q:Protective clothing is glass cotton wool type

Rock wool, also known as asbestos, is a kind of mineral cotton. A fluffy short staple fiber made from natural rock and minerals. Rock wool is a kind of inorganic fiber made of natural rock, such as Xuan Wuyan, gabbro, dolomite, iron ore, bauxite and so on. It is made by melting and fibrosis at high temperature.

Q:What kinds of exterior wall thermal insulation materials are there in Northwest China?

There are a lot of external insulation materials, including foam, mineral wool products, foam glass, expanded perlite insulation, powder particles insulation slurry EPS, spraying mineral cotton, foam cement insulation products, polystyrene particles, internal and external wall thermal insulation glazed hollow bead mortar and external wall putty and so on, you can according to the preferences and choose one or several price.

Q:Does water paint spray fire in underground space?

NeededWater based brand fire retardant paint thickness is determined by base material, such as wood, steel structure, etc.:1. ultra thin structure fire retardant coating (0-3mm)2. thin steel structure fire retardant coating (3-7mm), fire-resistant 2-5h3. thick steel structure fire retardant coating (7-45mm), applicable to high-rise civil buildings, columns, general industrial and civil construction, fire up to more than 3H4. mineral cotton fire retardant insulation coating

Q:What is mineral fiber cotton? Yes, it's insulation.

Mineral wool, glass wool, rock wool, slag including cotton (cotton), aluminum silicate fiber, alumina fiber, can be classified according to the production process of products use or use temperature etc..

Q:What are the differences between slag wool and rock wool?

Rock wool and slag wool, chemical composition and acidity coefficient comparison in our country, the main raw material for blast furnace slag slag cotton general or other metallurgical slag, the main raw material for rock wool basalt or diabase, the chemical composition of the differences between them are larger (

Q:What are the properties of fire-resistant coatings for steel structures?

Ultra thin structure fire retardant coating refers to the coating thickness of 3mm (including 3 mm) less than, decorative effect is good, high temperature can expand foaming, fire-resistant limit is generally less than 2 H steel structure fire retardant coating. This kind of fire retardant coatings for steel structures is generally solvent system, bonding strength, weathering has good water resistance, good leveling, good decorative features such as superior; subjected to fire slow expansion foam fire insulation layer to form a dense solid, the fireproof layer has a strong impact resistance, the temperature rise of steel delay, effective protection of steel member. Ultra thin intumescent steel structure fire retardant coating can be sprayed, brushed or rolled. It is generally used in building steel structures with a fire resistance requirement of less than 2 h. At present, there has been a fire resistance to meet or exceed the new ultra-thin fireproof coating for steel structure of 2 varieties of H, it is mainly based on the special structure of the poly methyl acrylate or epoxy resin and amino resin, chlorinated paraffin, compound as base adhesive, with high degree of polymerization of ammonium polyphosphate, melamine and pentaerythritol, double as the fire retardant system, adding titanium dioxide, wollastonite and other inorganic refractory material, using 200# as solvent and solvent oil compound. At present, all kinds of light steel structure, grid and so on, use this type of fire retardant coatings for fire protection. Because this type of ultra-thin fireproof paint coating, making use of thick and thin fire retardant coating for steel structure is greatly reduced, thereby reducing the total cost of the project, the steel structure has been effective fire protection, is currently promoting varieties on the market.

Q:What are the composite thermal insulation boards?

Polystyrene particle thermal insulation slurry, this kind of thermal insulation material water absorption rate is higher than other materials, use must do anti crack waterproof layer. Anti cracking and waterproof protective layer material is made up of anti cracking cement mortar and composite glass fiber net, which can effectively control the crack of protective layer for a long time

Q:What are the building energy saving materials?

Glass wool is second kinds of products of mineral wool, with silica sand, limestone, fluorite and other minerals as the main raw material, by melting method and centrifugal method, using flame or high energy gas blowing process, the molten glass liquid made of inorganic fiber. Glass wool products have good thermal insulation, heat insulation, sound absorption, non burning, corrosion resistance and other properties. They are widely used in building, piping, storage tanks, boilers, aircraft, ships and other parts of the insulation, heat insulation and sound absorption.