Home » Introduction » Components used in piping

Components used in piping

Safety Relief Valve: A Pressure Relieving Device

Table of contents: 1. Relief System 2. API 521 Sizing Criteria 3. Relief System – Pressure Terminology 4. Code Requirements 5. Pressure relieving methods 6. Relief valves 7. General Types of Safety Relief Valve Design 8. Advantages / Disadvantages Conventional Valve 9. Balanced Bellows Spring Loaded Safety Relief Valve 10. Advantages / Disadvantages Balanced Bellows Valve 11. Piston Type Pilot ...

Read More »

Vendor Drawing Review (VDR): Valve Specific Requirements

Specific Requirements : In the previous post we had discussed about the general requirements relating to the vendor drawing review (VDR) for the manual valves. But there are few requirements which are specific depending upon the type of the valves. These requirements are specified below based on valve type- Gate, Globe & Check Valves Ball Valves Butterfly Valves Double Block ...

Read More »

Vendor Drawing Review: A Review of Valve Drawings

Introduction to Vendor Drawing Review Vendor drawing review (VDR) is a review of valve drawings indicating cross sectional view, material of construction with respect to purchase requisition (PR)requirements / data sheets. Piping material engineer shall well understand  the Project/Client/contract specifications to take care of any requirements specified therein which need to be reflected in the drawing before taking up this ...

Read More »

Solenoid Valve – An Electromagnetic Part Of A Control Valve

Introduction to solenoid valve The solenoid valve is an electromagnetic part of a control valve. A solenoid valve is an electromechanically operated valve used for controlling liquid or gas flow. Solenoid valves are the prime means of enabling/disabling air supply to pneumatic actuators and are a critical element in the pneumatic actuation circuits of single and double acting pneumatic actuators. ...

Read More »

Clamp/Hub Connectors: Piping Connecting System

1. Introduction to Clamp/Hub Connectors Clamp/Hub Connector is a type of connection system which consists of three components, Hub, seal ring, clamp along with bolting. Applicable piping classes, sizes are generally considered as defined by the CLIENT specifications. Fig.1 shows the components of a clamp connector. The purpose of this post is to provide guidelines for design, material and inspection ...

Read More »

Plug Valve: An Isolation Valve

Table of contents: 1. Non-Lubricated Plug Valve 2. Lubricated Plug Valve 3. Eccentric Plug Valve 4. Expanding Plug Valve A plug valve is a quarter-turn on-off valve. The plug can be cylindrical or tapered and has a variety of port types. Plug valves are available in either a lubricated or non-lubricated design. Plug valve ends can be flanged, hub type ...

Read More »

Pressure Vacuum Relief Valve – Part 1

Table of contents: 1. Purpose of Pressure/Vacuum Relief Valves 2. How Pressure/Vacuum Relief Valves Function 3. Advantages of Pressure/Vacuum Relief Valve Purpose of Pressure/Vacuum Relief Valve In reality, properly sized opening on the tank roof protects the tank from rupture or imploading.  However, it constantly outbreath and inbreath and during outbreathing cycle it losses the vapour to atmosphere and possesses ...

Read More »

Types of Breather Valves

Basic function of breather valve The breather valve also known as pressure/vacuum relief valve is a protective device mounted on the top of a fixed roof atmospheric storage tank.  Its primary function is to conserve the loss of storage tank content when the tank is in out-breathing mode.  The purpose & selection of breather valve is mainly to control the ...

Read More »

Stud Bolt Length Calculation Method

Stud Bolt Length Calculation: Calculating the stud bolt length is one of the activities needed to be performed by the requisition engineer. The major factors which contribute towards the calculation of the stud bolt length are: Flange rating, dimensional standard, type & thickness of gasket, flange facing, sandwich type components (eg.spectacle blind, wafer type valves etc.) As per Nonmandatory Appendices ...

Read More »

Bolting: Selection Guide for Bolting Material

1. Introduction to bolts 2. Classification of bolting material 3. Applications of bolts 4. Dimensional standards for bolts Introduction to bolts: The flanges are drilled to receive bolts which, if of the proper material, will develop the full flange strength and result in a satisfactory joint at the service intended. The term ‘bolting material’ covers bolts, studs and stud bolts. As per ASME B16.5, ...

Read More »