ASTM A519 4140 pipe need to be conveyed in a size range not less than a certain length because A fixed length within a certain range is an effective measure to save ASTM A519 4140 steel pipe material. Steel mills can produce and supply ASTM A519 4140 steel pipes according to this size requirement.
Sometimes, ASTM A519 4140 steel pipe is also available in a random length, and the length of the 4140 pipe is within the standard range and does not require a fixed length.
The double scale length of the ASTM A519 4140 steel tube means that the length of the 4140 tube must be an integral multiple of the length specified in the order contract (plus sawing). For example, if the buyer requires a single foot length of 2 meters in the order contract, the double foot length is 4 meters, and the cutting length is 3 times 6 meters, respectively, plus one or two saws. The size of the saw is specified in the standard. Only positive deviations are allowed during the delivery of the feet and negative deviations are not allowed.
The fixed length of ASTM A519 4140 steel pipe shall be supplied to 4140 pipes according to the specified length. The 4140 steel pipe must have the length specified by the purchaser in the order contract. For example, the contract stipulates that 4140 steel pipes are delivered at a fixed length of 6 m, and then must be 6 m long, less than 6 m or longer than 6 m. But in fact, the delivery time is not always 6 meters long, so the rule allows positive deviations and does not allow negative deviations.
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