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## Mounded Bullet Design Load Cases as per EEMUA 190

Mounded Bullet Design Load Cases as per EEMUA 190 Introduction: This article is based on guidelines given in EEMUA 190. Design of mounded bullet is carried out as per PD 500 as suggested in EEMUA 190 (unless specified by the customer). Other codes like ASME also can be used for design calculations. Design of shell courses for internal and external…

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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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## 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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## 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…

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## Tubesheet :: Fill Pattern types & How to use SolidWorks Software to create Fill Pattern

Tubesheet & its Fill Pattern Tube sheets are used as supporting element and isolating tubes from each other in heat exchangers and boilers. Tube sheets are made from the round flat piece of plate (sheet) with holes drilled. The tube sheet should be customized designed by the engineer especially for each process equipment depending on the type of application and…

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## Theoretical & Computational Material Mixing using Rotating Impeller

Theoretical & Computational Material Mixing using Rotating Impeller Introduction: The purpose of this blog is to give an overview of “Theoretical & Computational Fluid Mixing using Rotating Impeller". Current Chemical & Bio-technical Process Industry widely used different types of Impellers according to their requirements which demands adequate & uniform concentration and temperature. The essential task of the mixers is to…

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## CFD Analysis of Jet Mixing using Eductor-Pump in a Large Wastewater Tank

CFD Analysis of Jet Mixing using Eductor-Pump in a Large Wastewater Tank Theoretical Background: Mixing is one of the common unit operations in chemical industries. The essential task of mixing equipment is to bring together two or more fluids/solids which are initially separated. McCabe rightly quoted “Many processing operations depend for their success on the effective agitation & mixing of…