stainless steel commercial flat washers are used under bolt heads or nuts to increase the bearing surface area, or to offer protection so that the nut or bolt can be rotated without distortion of the bearing surface. Flat washers are also used to give tightness to a joint, to prevent leakage, and especially to distribute pressure under the head of a bolt or nut. Dimensional specifications are governed by ASME B18.21.1. Commercial flat washers generally have a larger outer diameter than SAE (Society of Automotive Engineers) flat washers, and can be utilized in nearly any application. stainless steel fasteners are commonly used in applications that require general atmospheric corrosion resist ance, such as chemical and food processing equipment. Stainless steel has a higher corrosion resistance than carbon steel. Stainless Steel Washer,Ss Washer,Stainless Steel Square Washers,Black Metal Washers Taizhou Hongchuang Hardware Co., Ltd. , https://www.taizhouhongchuang.com
The difference between the control and power cables are different from <br> <br> Summary: Power cable trunk power system for transmission and distribution of electrical energy large features, is transmitted to the control cable from the distribution point of the power system electrical energy directly Various power equipment appliances power connection lines. The rated voltage of the power cable is generally 0.6/1kV and above, and the control cable is mainly 450/750V. When power cables and control cables of the same specifications are manufactured, the insulation and sheath thickness of power cables is thicker than that of control cables. (a) The control cables belong to the cables for electrical equipment and power.
Wire and cable manufacturing process outlined <br> <br> Summary: Most mechanical and electrical products manufacturing and production of wire and cable are completely different. Electromechanical products are usually used to assemble parts into parts and then assemble multiple parts into a single product. The product is measured in units or pieces. Wire and cable is based on the length of the basic unit of measurement. All electric wires and cables are started from the conductor processing, and the wire and cable products are made by adding layers of insulation, shielding, cables, and sheaths to the periphery of the conductors. The more complex the product structure, the more layers are stacked.
And the filling factor coefficient pressed appreciated <br> <br> Summary: fill factor: cross-sectional area than the actual strands and the strands by the outer diameter of the circular area is calculated, expressed as a percentage. The definition of the fill factor in the cable manual: The ratio of the actual cross-sectional area of ​​the core conductor to the cross-sectional area of ​​the core. Round core fill factor = sum of the cross-sectional area of ​​each single wire/rounded area of ​​the twisted wire core, fan-shaped, tile-shaped The core fill factor = sum of the cross sectional area of ​​each single line / the area of ​​the stranded core profile (ie, the cross section of the roll hole). Both parameters guide the parameters after the body is machined.
Detailed <br> <br> power cable Summary: long-term, safe and reliable transmission of large-capacity power supply insulated power cables called; power cable is a conductor with a high-quality outer insulating material and the cable various protective layers. Its main function is the same as overhead wires, which are used to transmit and distribute large-capacity power in the power system. The difference from the overhead line is that the power cable can be laid in various environments, be safe and covert, free from external climate change, and can be less maintenance and durable.
Structure and flame-retardant cable fire-resistant cables, characteristics and selection <br> <br> Summary: Structural fire-retardant cables and fire-resistant cables, characteristics and under what circumstances with cable ZR choose it? Under what circumstances is NH cable used? What is the difference in application? In recent years, in the global power system fire accident, the proportion of the power system power supply interruption due to the ignition of the power cable has increased. Therefore, fire-retardant cables are used to prevent the spread of fire in power plants, substations and other places where there are a large number of electrical equipment and densely laid cables, and fire-resistant cables are used to ensure important circuits.
How to distinguish irradiation crosslinked halogen flame retardant wire and cable <br> <br> Summary: product name identification method, wire - halogen flame retardant irradiation crosslinked polyethylene insulated wire and cable; Cable - Radiation-crosslinking low-smoke halogen-free flame-retardant polyethylene insulated low-smoke halogen-free flame-retardant polyethylene sheathed power cable. Imitations will have a slightly different name in general, such as irradiation cross-linked polyethylene insulated low-smoke halogen-free sheathed flame-retardant power cables and so on. The skin burns and burns. The insulation layer should not be significantly sunken with electric iron. If there is a large depression, it indicates that the material or process used in the insulation layer is defective. Or use a lighter to grill, it should be easy to point under normal circumstances.
<br> <br> issue a summary of the cable and an important part of the preparation of tenders should be noted: book before beginning the preparation of the bid must be based on careful review of all the terms of the content of tenders and the tender of understanding fully digest on. During the preparation of bids, the corresponding clauses of the invitation for bid shall be required to respond accordingly. Otherwise, the bidders will be deemed as having differences or non-responsiveness (the points will be deducted during the bid evaluation), and the serious ones may be deemed as invalidated. Bid business documents are usually prepared by import and export companies or factory import and export departments, and technical documents are prepared or provided by manufacturers or related technical engineers.
The type and function of ground <br> <br> Summary: Grounding technology has broad and deep applications in modern electronics. The "ground" of electronic equipment usually has two meanings: one is "earth" (safely) and the other is "system base" (signal ground). Grounding refers to establishing a low-resistance conductive path between the system and a potential reference plane. "Connected to the earth" is based on the earth's potential and uses earth as its base.
Mineral insulated cable characteristics <br> <br> Summary: 1, MI cable structures: Mineral insulated cable with copper conductor, an inorganic insulating magnesia high conductivity, seamless copper sheath as the basic structure. 2. Working temperature of mineral insulated cable: The continuous working temperature of mineral insulated cable is 250°C; it can work close to the melting point of copper 1083°C (magnesium oxide melting point is 2800°C) in a short time or in an extraordinary time; it can be held at 950°C-1000°C.
Cable basic knowledge (basic structure and its structural characteristics, basic concepts of cables and differences with electric wires, cable selection and precautions when laying, basic principles and characteristics of cable selection materials, cable attention in the production process, This column also includes the understanding and preliminary understanding of relevant certifications in the cable industry. It is hoped that this topic of cable basic knowledge will help you understand the cable industry.