Superhigh Pressure Testing Pipeline

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Superhigh Pressure Testing Pipeline

Q: What is the fastener and others?: Department of mechanical engineering (a subject); mechanical parts (two subjects); fasteners (three subjects)

Q: In the fastener industry, 1018 refers to what material: Low-carbon steel. Domestic in accordance with the Japanese standard to create the SWRCH18A. (JIS G 3507) Carbon C: 0.15 to 0.20 Silicon Si: 0.17 to 0.37 Mn Mn: 0.60 to 0.90 Phosphorus P: ≤0.030 Sulfur S: ≤0.035 The carbon content of the material is relatively low and can not be quenched and tempered. Used for cold piers to make low-grade screws. Pull up the strength of 450Mpa.

Q: A194 GR3 is what style fasteners: ASTM A194 is high pressure and, or high temperature conditions with the bolt to match the carbon steel and alloy steel nuts, as GR3 I did not see such a description in the standard

Q: For the commonly used standard parts, for some of the quality of good or bad, how to distinguish,: The appearance of a color, thread through the rules, type size, such as head high, diagonal, opposite, thread length and so on. Mechanical properties include tensile strength, core hardness, decarburization, carburizing, and the like.

Q: The main meaning is that the design to make some specific requirements to achieve consistency.: Specification is: can not affect the performance of the product being used, and fully guarantee the effect of fastening.

Q: Is it hard to heat the fasteners?: Fasteners are also known as standard parts, which are mainly heat-treated according to the material of the product.

Q: What is the name of the screw (fastener)?: Screw, it was also called "screw" [screw], "screw" (screw). In fact, the screw is known, and the screws, screw rods are different from each other. Screws are generally called wood screws; is the tip of the kind of tip, pitch larger, generally used to tighten wood parts, plastic parts. Screw is a screw (mechanical screw), is the front of the kind of flat head, pitch is small, uniform, generally used to fasten the metal, machine parts.

Q: Does the fastener include screws?: A type of fastener with no head at both ends. At the end of the connection, it must be screwed into the part with the internally threaded hole and the other end through the part with the through hole and the nut is screwed even if the two parts are fastened together. This type of connection is called a stud connection and is also a detachable connection. Mainly used for one of the connected parts of a larger thickness, requiring a compact structure or due to the frequent removal of the bolt should not be used occasions.

Q: Are there categories of fasteners classified by material?: Mainly carbon steel, alloy steel, stainless steel, other materials category

Q: Our company to purchase a number of fasteners to see when the CAD drawings in the technical requirements I do not know the specific to write those content: Name: Bolt nut flat cushion pad - (should be written in the national label) Drawing No .: Ask the engineer Material: Q235 Q235 steel spring steel ---- ordinary 35 steel 35 steel spring steel ---- high strength ratio: according to the actual Drawing quality: check the information or do not fill the level: 4.8 5 200HV 65MN ------ ordinary 8.8 8 300HV 65MN ------ high strength specifications: write their own

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