Inst ToolsInst ToolsInst Tools
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Search
  • Books
  • Software
  • Projects
  • Process
  • Tools
  • Basics
  • Formula
  • Power Plant
  • Root Cause Analysis
  • Electrical Basics
  • Animation
  • Standards
  • 4-20 mA Course
  • Siemens PLC Course
Reading: Safety Relief Valve Material Selection
Share
Notification Show More
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • Design
  • PLC
  • Interview
  • Control System
Search
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > Control Valves > Safety Relief Valve Material Selection

Safety Relief Valve Material Selection

Last updated: June 10, 2019 11:11 am
Editorial Staff
Control Valves
1 Comment
Share
3 Min Read
SHARE

An important factor in selecting the correct Safety Relief Valve is choosing the correct materials for the application.

It is obviously impossible to cover all possible applications, but we will provide some general guidelines here.

Safety Relief Valve Selection

Safety Relief Valve

Sour gas applications: Here, NACE recommendations should be followed. Most wrought grades are acceptable to NACE. Therefore, in general, duplex valves with bar stock nozzles and discs will meet NACE requirements.

Some limited cast grades will generally comply also:

  • ASTM A890 CE3MN UNS J93404
  • ASME SA 351 CD3MWCuN UNS J93380
  • ASME SA 351 CE8MN UNS J93380
  • Z 6 CNDU 28.08 M, NF A 320-55 at 17 HRC MAX
  • ASTM A351 CK3MCUN (6Mo)
High -temperature applications (>530°C): As a general rule, a bellows should be used so that the spring gets protected from heat and does not shift its characteristics during eventual temperature cycles.
Safety Relief Valve Material Selection

For body, bonnet and cap, up to 815 ° C cast materials can still safely be used : ASME SA 351 CF8M with a minimum 0.04% carbon content and maximum 8% ferrite content. In any case, full-rated and integral castings are recommended. Alternatives are:

  • ASME SA 351 CF8 SAME (with same chemical restrictions as CF8M)
  • ASME SA 217 WC6 (up to maximum 593 ° C)
  • ASME SA 217 WC9 (up to maximum 593 ° C)
Wrought materials can also be used up to 815 ° C: ASME SA 479 Grade 316H with a carbon content between 0.04% and 10%. Alternatives are:

 

  • ASME SA 479 Grade 304H (same chemical restrictions as 316H)
  •  ASME SA 479 Grade 347H (same chemical restrictions as 316H)
For the temperature range 530 ° C to 815 ° C, the following precautions should also be taken into consideration:

 

  • Recommended bolting material: ASME SA 193 Grade B8 Class 2/ASME SA 194 Grade 8 – strain hardened.
  • Recommended bellows material: INCONEL 625 Grade 2 (LCF) – annealed after forming or HAYNES ALLOY 230. ASTM B435 UNS N06230 is preferred above 650 ° C but is rather expensive.
  • Recommended spring material: INCONEL X750. Above 232 ° C, 316SS springs should no longer be used. INCONEL X750 or chrome-plated springs should be considered. Note that cadmium plating used in the past is no longer allowed.
  • Recommended gasket material: 316 STAINLESS STEEL.

Articles You May Like :

Relief Valve vs Safety Valve

Safety Valves Testing

Pressure Safety Valves P&ID

Requirement of Control Valves

Safety Relief Valve Questions

Don't Miss Our Updates
Be the first to get exclusive content straight to your email.
We promise not to spam you. You can unsubscribe at any time.
Invalid email address
You've successfully subscribed !

Continue Reading

Control Valves Mechanical Friction Problems
What is Travel Stop in Control Valve?
Why we Measure Control Valve flow coefficient (Cv)?
Erratic Stroking Control Valves Delaying the Shutdown Plant Restart
Basics of Ball Valves
Self Actuated Pressure Control Valve Functional Testing
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
1 Comment
  • Netra Hazare says:
    July 18, 2023 at 1:48 pm

    Wow, this article provided a fresh perspective on the topic! I appreciate the thorough research and the clear way the information was presented. It’s always great to learn something new. Thank you for sharing.
    I came across a website help me a lot. Just check out once.
    https://www.nirmal.co.in/

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
210kSubscribersSubscribe
38kFollowersFollow

Categories

Explore More

What is a 2-way Solenoid Valve ?
Four Way Solenoid Valve Working Principle
Fluid Power Systems
Digital Control Valves – Introduction, Principle, Setup, Applications
What is ON/OFF Valve ?
Pressure Relief Valve Principle
Electrical Actuators
What is Reducing Valve ?

Keep Learning

Two SOV Connections

Two Solenoid Valves Working Principle

Valve Basics, Sizing, and Actuators Books

Valve Basics, Sizing, and Actuators Books

Classification of Solenoid Valves

Classification of Solenoid Valves

Snap Acting Relay Working Principle

Snap Acting Relay Working Principle

Solenoid Valve Problems and Solutions

Solenoid Valve Problems and Solutions

Choke Valve Hydro Test Setup

Choke Valve Hydro Testing Procedure

Hydraulic Actuator

Types of Valve Actuators

Opposite Acting Valves

What is Split Range Control Loop ?

Learn More

PLC Modbus Communication

Introduction to Modbus – Reading and Writing Data

Valve Basics, Sizing, and Actuators Books

Valve Basics, Sizing, and Actuators Books

Relation Control

Relation Control System

Parallel Circuit

Parallel Circuit

Types of Pressure Measuring Scales

Types of Pressure Measuring Scales

How to Install Ultrasonic Level Transmitters 5

How to Install Ultrasonic Level Transmitters

Radar Level Transmitter in Briddle level Measurement

Radar Level Transmitter in Briddle level Measurement

Positive Displacement Pumps

What are Positive Displacement Pumps and their Types?

Menu

  • About
  • Privacy Policy
  • Copyright

Quick Links

  • Learn PLC
  • Helping Hand
  • Part Time Job

YouTube Subscribe

Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?