ASTMA106 is a standard developed by the American Standards Institute (ASTM), which involves the manufacturing and processing of seamless steel pipes. The ASTMA106 standard steel pipe can be used for high-temperature and high-pressure services and general services. It complies with standards such as ASTM A53, A106, API5LG3454, G3456, etc. The following is a detailed explanation of the content of the ASTMA16 standard: Materials and manufacturing materials. The ASTMA106 standard pipe materials are divided into three grades: Grades a, B, and C. Grade A refers to the pipe with the least carbon content, while Grade C refers to the pipe with the most carbon content. Grade B is the most commonly used because of its high material strength.
ASTM A179/A179M-90A (Reapproved 2001) "Cold drawn seamless low-carbon steel heat exchanger and condenser steel pipes" This standard is applicable to the thinnest seamless steel pipes used in tubular heat exchangers, condensers, and similar heat transfer devices: Scope of application 2 This standard is applicable to steel pipes with a thickness of 3.276.2mm. Unless otherwise specified in the state standard, it should also comply with the applicable clauses of ST450450. 3. Surface quality without oxide scale: Other surface quality shall be in accordance with the grade and chemical composition (%) specified in ASTM A450/450M. Note: It is not allowed to provide alloy grades that specifically require the addition of elements other than the above elements. 5. After the final cold drawing of heat treatment, heat treatment shall be carried out at a temperature not less than 650 ºC
HRB ≤ 72, the sampling requirement is to take any two steel pipes from each batch for Rockwell hardness testing. (The so-called "touch" refers to all undivided steel pipes of the same nominal diameter and wall thickness produced from the same furnace steel. If it is a batch furnace 6 hardness test, the batch only refers to steel pipes of the same furnace number, size, and heat treatment in the same furnace; if it is a continuous furnace, the batch should include all steel pipes of the same furnace number, size, and heat treated in the same heat treatment furnace at the same temperature, heating time, and furnace speed.) Method: According to ASTMA450/A450M, samples are taken from each batch of steel pipes or the remaining parts, and two steel pipes are cut and tested for pressure fan test. (One batch of pipes is 250 pieces)
For steel pipes with S/D<10% (S is the actual average wall thickness), if specified, curling should be used instead of flaring. According to ASTM A450, take 9 edge rolling performance samples from each batch of steel pipes or the remaining parts, and cut two steel pipes from each sample for testing. Steel pipes that do not comply with the above regulations do not need to undergo edge rolling tests. (One batch of pipes is 250 pieces) Test the water pressure, and if the purchaser agrees, non-destructive replacement water pressure can be used. Non destructive testing shall be carried out according to ASTM A450/4450. In addition to the requirements of ASTM A4450/A450M, the product identification shall also include the name of the purchaser and the order number
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ASTM A179/A179M-90A (Reapproved 2001) "Cold drawn seamless low-carbon steel heat exchanger and condenser steel pipes" This standard is applicable to the thinnest seamless steel pipes used in tubular heat exchangers, condensers, and similar heat transfer devices: Scope of application 2 This standard is applicable to steel pipes with a thickness of 3.276.2mm. Unless otherwise specified in the state standard, it should also comply with the applicable clauses of ST450450. 3. Surface quality without oxide scale: Other surface quality shall be in accordance with the grade and chemical composition (%) specified in ASTM A450/450M. Note: It is not allowed to provide alloy grades that specifically require the addition of elements other than the above elements. 5. After the final cold drawing of heat treatment, heat treatment shall be carried out at a temperature not less than 650 ºC
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