Explosion-proof distribution box bolt standard specification solutions

Explosion-proof distribution box bolt standard specification solutions

I. Standard requirements of explosion-proof bolts

Explosion-proof distribution box bolts are connection fittings used inside the explosion-proof distribution box, which must have good explosion-proof performance, corrosion resistance, pressure resistance, and wear resistance. The bolt material, characteristics, size, tooth type, and mechanical properties of the standard requirements are different according to different working environments.

JIS High-Strength Steel Flanged Hex Head Screws: Made to Japanese Industrial Standards, these Class 10.9 steel screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws. The flange distributes pressure where the screw meets the surface, eliminating the need for a separate washer. The zinc plating provides corrosion resistance in wet environments. Head height includes the flange. Length is measured from under the flange.

Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don't know the pitch. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance.

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1, Material requirements

The essential requirement of explosion-proof distribution box bolts is that they are made of high-strength stainless steel, usually stainless steel 304, 316, 316L, and other materials. This material has good corrosion resistance and can generally resist salt, acid, alkali, and other chemical corrosives.

2, The characteristics of the requirements

Explosion-proof distribution box bolt characteristics include heat resistance, water resistance, dust resistance, and mechanical properties. In different environmental conditions, explosion-proof bolts, materials, shape, size, tooth type, and other requirements are different for specific application scenarios of unique requirements. For example, using a corrosion-resistant environment and needing corrosion-resistant surface treatment in high-strength, high-temperature conditions require appropriate strengthening treatment.

3, size, tooth type requirements

Explosion-proof distribution box bolt size and tooth type requirements must be determined according to actual needs. The choice of these parameters determines the strength and sealing of the connection. When selecting explosion-proof bolts, one needs to consider whether their tightening is enough to achieve protection.

4, Mechanical performance requirements

Explosion-proof distribution box bolt mechanical properties mainly include strength, hardness, and wear resistance. Generally require explosion-proof bolts to meet the relevant international standards, such as international ISO standards, with sufficient mechanical strength and wear resistance.

Explosion-proof distribution box bolt selection precautions

The selection of explosion-proof distribution box bolts must carefully check their material, performance, size, tooth type, and mechanical properties. In addition, the following considerations:

1, with the use of places compatible with the accuracy and materials, such as American Standards, Japanese standards, and other international standards

2、The selection of fittings and flexible connections

Three 、Requirements on the tightening torque value when locking the pipe nut

4, Other considerations.

It should be noted that the choice of explosion-proof bolts needs to consider the actual use of the scene and be adjusted according to specific conditions.

What is the difference between electrical bolts and ordinary bolts?

1, the use of different: Electrical bolts are mainly used in electrical equipment, instrumentation, power and other industries, installation, and maintenance, while ordinary bolts are widely used in various fields, such as construction, machinery, automobiles, and so on.

2, different corrosion resistance: Electrical bolts are required to prevent corrosion in specific circumstances, so stainless steel is used. Ordinary bolts are not necessarily anti-corrosion; you can use cheaper steel.

3, the surface treatment is different: electrical bolt surface treatment is usually natural color or nickel-plated to enhance electrical conductivity and corrosion resistance, while the surface treatment of ordinary bolts is diversified, such as galvanized, blackened, chrome-plated, and so on.

Explosion-proof bolts selection range

Explosion-proof bolts are suitable for places that require a high degree of protection, such as petroleum, chemical, metallurgy, food, medicine, and other fields. They can connect equipment or devices with high strength and harsh environmental requirements. Commonly used models are M6, M8, M10 and so on.

Medium-Strength SAE Grade 5 Steel Square Head Screws: Made from Grade 5 steel, these screws are suitable for fastening most machinery and equipment. Large flat sides make them easy to grip with a wrench and keep them from rotating in square holes. A zinc yellow-chromate plating provides corrosion resistance in wet environments. Grade 5 steel square head screws are marked with three radial lines. The material meets SAE J429 specifications for quality. Dimensions meet ASME B18.2.1 specifications. Length is measured from under the head.

Conclusion

This article describes in detail the explosion-proof distribution box bolts of the standard specifications and the selection of precautions to facilitate the user's understanding of the characteristics and role of the actual use and provide users with a suitable range of choices. The explosion-proof distribution box should be selected according to the actual situation to ensure the rationality and stability of product performance.