Class 150 Flange Dimensions in MM (PDF) – Complete Size Chart & Standards
Class 150 flanges are the most commonly used flanges in industrial and commercial pipeline systems. They are suitable for low to moderate pressure applications and conform to ANSI/ASME B16.5 standards. In this article, we’ll provide a complete Class 150 flange dimensions chart in mm, key specifications, and download options in PDF format.
For high-quality Class 150 flanges in MS, GI, and SS, visit Udhhyog — one of the leading flange manufacturers and suppliers in Delhi.
What is a Class 150 Flange?
A Class 150 flange refers to the pressure rating of the flange — suitable for systems with pressure up to 150 psi at ambient temperature. It is commonly used for:
Water pipelines
HVAC systems
Oil & gas distribution
Industrial processing units
Standards Followed: ANSI B16.5, IS 1538, ASTM A105, A182, etc.
Class 150 Flange Dimensions Chart (MM)
Nominal Size (NB)OD (mm)Bolt Circle (mm)No. of BoltsBolt Hole Dia (mm)Flange Thickness (mm)15 mm (1/2")8960.3415.911.220 mm (3/4")98.469.9415.912.725 mm (1")10879.4415.914.240 mm (1-1/2")12798.4415.915.750 mm (2")152.4120.6419.117.580 mm (3")190.5152.4419.120.6100 mm (4")228.6190.5819.122.2150 mm (6")279.4241.3822.225.4
📥 Download PDF Chart: Udhhyog Class 150 Flange Dimensions PDF
Available Flange Types in Class 150
Blind Flange
Weld Neck Flange
Socket Weld Flange
Slip-On Flange
Lap Joint Flange
Materials offered:
Mild Steel (MS)
Galvanized Iron (GI)
Stainless Steel (SS 304 / SS 316)
Pressure & Temperature Ratings
ClassPressure Rating (psi)Temp (°C)150~150 psiUp to 200°C
Tip: Always consider gasket material, bolt rating, and flange face (RF or FF) for accurate system design.
Where to Buy Class 150 Flanges in Delhi?
Udhhyog is a leading supplier and manufacturer offering:
Fast dispatch across Delhi NCR, Punjab, Haryana, UP, Rajasthan, J&K
Custom sizes & drilling as per client drawings
Full documentation with pressure test & dimension reports
📞 Call now or visit our product page: https://udhhyog.com/flange
FAQs
Q1: What is the bolt hole size for a 4-inch Class 150 flange? A: It is 19.1 mm as per ASME B16.5 standard.
Q2: Can I use Class 150 flanges for steam lines? A: For low-pressure steam (under 150 psi), yes. For high pressure, use Class 300 or 600.
Q3: Where to get Class 150 flange dimensions PDF? A: Download it from Udhhyog Flange Page.
