Formaldehyde is a gas with a strong pungent odor, which can cause headache, insomnia, cough, tearing, and carcinogenic effects. Therefore, in the decoration process, try to use formaldehyde-free viscose, benzene-free thinner, formaldehyde-free large core board, veneer, etc., to improve the indoor air quality level after renovation.
(1) Those who are preparing to decorate their living rooms should pay attention to the environmental protection of interior decoration materials, because a considerable part of indoor environmental pollution is caused by improper materials used in the decoration process, such as inferior fiberboard, plywood, paint, paint, adhesive and furniture. Carpets, etc. will release a large amount of organic gas pollutants, including formaldehyde, benzene, xylene and other volatile organic gases, of which formaldehyde is one of the most representative toxic gases.
(2) After purchasing new homes, furniture and new homes, don't rush to check in. You should first check the indoor environment testing department, listen to the experts' opinions, and choose the appropriate check-in time.
(3) Selecting effective indoor air purification facilities, air purification devices with different functions, such as air purifiers and exhaust hoods, can be selected according to different pollutions of living room, kitchen and sanitation.
(4) Ventilation and ventilation is the most economical way to prevent indoor environmental pollution. Regardless of whether there is anyone in the house, it should be ventilated as much as possible. On the one hand, it is conducive to the discharge of indoor pollutants, and on the other hand, the toxic and harmful gases in the decoration materials can be released as soon as possible. Therefore, it is necessary to maintain ventilation in the living room. It can keep the indoor pollutant concentration below a certain level and keep the indoor air clean. For a house with an area of ​​10 square meters per person, it is necessary to ventilate 3 times an hour.
(5) Maintain a certain humidity and temperature in the indoor environment. The humidity and temperature are too high. Most of the pollutants will be emitted from the decoration materials quickly. This is unfavorable when there are people indoors. At the same time, the humidity is too high, which is beneficial to the reproduction of microorganisms such as bacteria. However, when there is no one in the house, for example, when taking a trip, some measures can be taken to increase the humidity.
(6) Appropriate amount should be used when using insecticides, incense agents and deodorants. These substances have certain effects on indoor pests and odors, but they also cause some harm to the human body. Especially when the wet type is used, the spray-like particles generated can adsorb a large amount of harmful substances into the body, and the damage is much more serious than that of the dry type.
Other Track Bolt styles
Materials: Steel Q235, 35#, 45#; Alloy Steel 40Cr, 42CrMo, 35CrMo
Grade: 4.6/4.8/5.6/5.8/8.8/10.9/12.9, AREMA Gr5/Gr8
Standard: AREMA, UIC, DIN, BS, GOST, NF, JIS, GB/TB, AS or required specification from clients
Type: Fish Bolt/ Frog Bolt/ Clip Bolt/ Clamp bolt
Surface: Plain Oiled, Oxygen Black, Zinc Plated, Hot Dip Galvanized, Dacro coating
Most popular bolt:
Fish bolts with button head and square head are most popular, with specifications as below:|
Type |
Button head oval neck fish bolt |
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Button head diamond neck fish bolt |
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Square head fish bolt |
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Grade |
4.6 |
5.6 |
8.8 |
10.9 |
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Material |
Q235 |
35# |
45# |
40Cr |
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Mechanical properties |
Tensile strength:≥400Mpa |
Tensile strength:≥500Mpa |
Tensile strength:≥800Mpa |
Tensile strength:≥1000Mpa |
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Yield strength:≥240Mpa |
Yield strength:≥300Mpa |
Yield strength:≥640Mpa |
Yield strength:≥900Mpa |
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Elongation:≥22% |
Elongation:≥20% |
Elongation:≥12% |
Elongation:≥9% |
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Cold bending:90 degree without crack |
Cold bending:90 degree without crack |
Cold bending:90 degree without crack |
Cold bending:90 degree without crack |
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Surface |
Plain (oiled), Oxide black, Zinc, HDG, wax, bitumen, Dacromet, Sherardizing |
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Standard refers |
AS, BS 64, DIN, AREMA/SAE,NF,JIS |
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Accessories
* Nut:
Type: square nut/heavy square nut/hex nut/heavy hex nut/flange nut/slotted nut/lock nut/wrench nut, etc.
Material:Steel Q235, 35#, 45#; Alloy Steel 40Cr, 42CrMo, 35CrMo
Grade: 4/5/8/10/12, AREMA ,SAE J995
Surface: Plain Oiled, Oxygen Black, Zinc Plated, Hot Dip Galvanized, Dacro coating
*Spring washer
Material: 65MN/60Si2Mn
Grade: AREMA 1967/ GB
Surface: Plain Oiled, Oxygen Black, Zinc Plated, Hot Dip Galvanized, Dacro coating
Other bolt styles
*Clip bolt for tension clip
*Clamp bolt for clamp
* Frog bolt for turnout: square head bolt/thin square head drilled bolt/BHON bolt
*Tunnel bolt: Spear bolt/ curved bolt
Frog Bolt,Button Head Oval Neck Frog Bolt,Squarehead Frog Bolt,Thin Head Square Bolt
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