×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Gate Valve with solid wedge complying to NACE MR-01-75
2

Gate Valve with solid wedge complying to NACE MR-01-75

Gate Valve with solid wedge complying to NACE MR-01-75

(OP)
My client says that he require Gate valve with solid wedge complying to NACE MR-01 75. I informed my client that solid wedge is not possible & we can provide flexible wedge only as most of our valve manufacturers produces flexible wedge only. My client has replied that since NACE compliance is required, they want solid wedge only & not flexible wedge. My client informs that if NACE compliance is not required, then they can accept flexible wedge.

Is there any relation between NACE compliance & the type of the wedge.

RE: Gate Valve with solid wedge complying to NACE MR-01-75



You will have to aquire the latest valid issue of the complete NACE MR 01-75 to answer this. I am not familiar with this, and can not tell you neither content, nor if this is 'latest'.

On the other hand, when 'NACE Compliance' (without any further description or details) is mentioned, this will normally describe the different non-corrosive material qualities allowed in construction for certain applications and equipment, and relevant tests and certificates for this.

I doubdt NACE would give instructions for wedge type, but this will probably be specified by other specifications, as indicated by the answer to you.

Sorry for the 'roundabout' comments, maybe others could be more specific. I am however sure the exact required type, with required certifications, exists in the market.

RE: Gate Valve with solid wedge complying to NACE MR-01-75

I've never seen any NACE spec go beyond material requirements. As far as I have read and unless I missed it MR0175 and MR0103 (the two most common NACE specs when discussing valves) do not address wedge design.



Side note I always thought that an argument can be made that a flex wedge is a solid wedge. It's made from a single solid casting it's not two or more pieces.

The only service that I have ever found that actually does not want a flex wedge over a "solid" wedge is certain types of ash service where the ash can pack into the flex wedge crevice

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources