{"id":5539,"date":"2022-07-30T09:08:58","date_gmt":"2022-07-30T03:38:58","guid":{"rendered":"https:\/\/www.pipingmart.com\/blog\/?p=5539"},"modified":"2022-07-30T09:14:29","modified_gmt":"2022-07-30T03:44:29","slug":"how-do-i-choose-a-bolt","status":"publish","type":"post","link":"https:\/\/blog.thepipingmart.com\/other\/how-do-i-choose-a-bolt\/","title":{"rendered":"How Do I Choose a Bolt?"},"content":{"rendered":"
In the piping sector, bolted joints are commonly used. Flanged joints can only be considered with adequate bolting. As a result, the selection of the right bolts is essential for good joining and leak prevention. In this article, a few requirements that regulate the bolts used to construct flanged joints are explained.<\/span><\/p>\n The bolt selection criterion can be divided into two categories based on their limitations:<\/span><\/p>\n When spiral wound gaskets are used for high-temperature applications, the bolts must generate sufficient pressure to seat the gasket.<\/span><\/p>\n Standard quenched and tempered ASTM A193 Grade B7 stud bolts with 2H nuts shall be used for sour wet services when the bolting is as follows:<\/span><\/p>\n Stud bolts according to ASTM A193 Grade B7M with nuts complying with A194 Grade 2HM must be used in the following circumstances:<\/span><\/p>\n Machine Bolts:<\/b> In a non-sour environment, steel machine bolts complying with ASTM A307 Grade B may be used on flat-faced cast-iron or non-metallic flanges. ASTM A563 Grade D nuts must be used. When the Grade D nuts are not desulfurized, this bolt and nut combination can be used in sour services. This technique is also appropriate when “weak” bolting is required to avoid overloading flanges. This bolt might be zinc plated.<\/span><\/p>\n Expansion and contraction:<\/b> When fluid temperatures are less than minus 45 degrees Celsius, the bolting material or design must consider differential contraction between flanges and bolts so that changes in gasket seating pressure do not result in leakage. Similarly, differential expansion must be considered at operating temperatures above 300 degrees Celsius.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":" In the piping sector, bolted joints are commonly used. Flanged joints can only be considered with adequate bolting. As a result, the selection of the right bolts is essential for good joining and leak prevention. In this article, a few requirements that regulate the bolts used to construct flanged joints are explained. The bolt selection […]<\/p>\n","protected":false},"author":1,"featured_media":5540,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[197],"tags":[],"yoast_head":"\n\n
<\/span>Physical Limitations in Bolt Selection<\/b><\/span><\/h3>\n
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<\/span>Material Limitations for Bolt Selection<\/b><\/span><\/h3>\n
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<\/span>Bolting Materials for Upper Intermediate Temperature Services:<\/b><\/span><\/h3>\n
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<\/span>Sour Service Bolting Materials: <\/b><\/span><\/h3>\n
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