HCBBS Forum (English)
HomeForumView Original
Submit Chemical Projects / Find Solutions
Amplify Your Requirements on a Broader Chemical Platform *Engineering · Technology · Equipment · Solutions*
Submit Request
English Translations » 信息处理 » What is the relationship between the two pressure vessel fla

What is the relationship between the two pressure vessel flange standards?

2015-03-29View Original

Thread Content

**What is the difference between the pressure vessel flange standards JB/T 4700-4707 issued by the Machinery Industry Bureau and the Petroleum and Chemical Industry Bureau, and NB/T 4720-4727 issued by the Energy Bureau? The flange specifications in these standards are the same; then why were two separate standards created?
Reply #22015-03-29
NB/T 4720-4727-2012 replaces JB/T 4700-4707-2000; the latest standards are adopted.
Reply #32015-03-29
NB/T4720-4727-2012 replaces JB/T 4700-4707-2000: one is new and the other is old
Reply #42015-03-29
There was a departmental restructuring within the organization responsible for the standards, and all the previous JB designations were replaced with NB
Reply #52015-03-29
With the merger of departments, the industry standards (JB) formerly issued by the Ministry of Machinery were replaced by those issued by the Ministry of Energy (NB). :)
Reply #62015-03-30
There is overlapping functionality; we can only go by the most up-to-date version

Related Threads in This Forum

← Previous

No previous threads indexed

Next →

No next threads indexed

Browse all threads in this forum →

Translated at 2026-07-26 05:49:29

Original: https://bbs.hcbbs.com/thread-1383809-1-1.html

© 2026 HCBBS Forum. Content translated for international readers.

Submit a Project

**Looking for Chemical Technology, Equipment & Solutions?** No Registration Required Broader Platform Exposure | Global Chemical Service Provider Connections

Submit Request — Free Consultation

Disclaimer

This is an automated machine translation of the original thread. Some technical terms may have inaccuracies; the original text shall prevail. Click "View Original" at the top right to access the source page, which supports IP-based automatic real-time language translation. Please watch out for contact details and sales inducements to prevent fraud. All content and translations are for reference only, representing solely the poster's personal views. For enquiries, email service@hcbbs.com.

Quick Links