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Bolting Torque Calculations

Bolting Torque Calculations Introduction: In order to achieve required leak-proof tightening of bolted flange joint assembly, appropriate bolt tightening method is used. Proper tightening of flange joint assembly creates compressive forces on gasket and pre-tensioning in bolts. As per bolt tightening methods or guidelines, cross tightening sequence is followed. Several cross tightening methods are available such as hand torque, slug/hand…



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Nilesh More
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Impact Test Requirements as per ASME Section VIII Division 1

Impact Test Requirements as per ASME Section VIII Division 1 Introduction Carbon steel and low alloy steels show a drastic change in room temperature ductility at sub-zero temperatures. This behavior is different for different types of materials. Therefore, impact testing at such service temperatures is mandatory to ensure the strength of vessel material. ASME provides some exemption for impact testing…



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Post Weld Heat Treatment (PWHT) Requirement as per ASME Section VIII Division 1

Post Weld Heat Treatment (PWHT) Requirement as per ASME Section VIII Division 1 Introduction: Post weld heat treatment (PWHT) is controlled process in which a material that has been welded is reheated to a temperature below its lower critical transformation temperature, and then is held at that temperature for the specified amount of time. The need of PWHT is mostly…



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Sagar Karande
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Creep-Fatigue Life Assessment Analysis as per API 579 FFS-I

Creep-Fatigue Life Assessment Analysis as per API 579 FFS-I Some of the equipment’s like tower or reactors are very critical equipment in refineries due to very high temperature and pressure. The temperature is also very high and coke tower works in the creep range for some duration of one full cycle. In such cases, creep along with fatigue plays a…