Non-destructive testing of flanges

Date: 2023-10-16

Non-destructive testing of flanges Relevant provisions in the national flange standard “GB/T9124-2010 Technical Conditions for Steel Pipe Flanges”: 3.2.1 For flanges with nominal pressures of PN2.5-PN16 Class150, low carbon steel, and austenitic stainless steel forgings are allowed to be Class I forgings (the hardness is tested piece by piece). 3.2.2 If the following conditions are met, the forgings for flanges shall meet the requirements of Class III or above forgings (sampling tensile inspection and ultrasonic testing one by one): 1. Forgings for flanges with nominal pressures ≥PN100 and ≥Class600; 2. Chromium-molybdenum steel forgings for flanges with nominal pressures ≥PN63 and ≥Class300; 3. Ferrite forgings for flanges with nominal pressure ≥ PN25 and Class ≥ 300 and operating temperature ≤ -20°C. 3.2.3 Other flange forgings should comply with the requirements for Grade II or above forgings (spot inspection and drawing). Post time: Oct-16-2023

Prev : Basic introduction to high-pressure boiler steel pipes
Next : Tips for choosing the best stainless steel pipe
Tags : oil pipe , drill pipe , stainless steel pipe manufacturer , ERW steel pipe provider

News

Latest news list

How to Buy Hydraulic Steel Pipe: 7 Things Every Industrial Buyer Should Check

After supplying hydraulic steel pipes for industrial equipment manufacturers,EPC contractors,and hydraulic system fabricators across more than 100 countries,we have found that procurement issues are rarely caused by product availability,More often,they result from incomplete specifications,missing inspection requirements,or selecting suppliers based solely on price,
How Were Hydraulic Steel Pipes Successfully Delivered for an Industrial Hydraulic System Project

Delivering hydraulic steel pipes for industrial equipment requires far more than manufacturing tubes to the correct dimensions,Consistent mechanical properties,clean internal surfaces,reliable inspection records,export-grade packaging,and on-time logistics all contribute to a successful project,
How Are Hydraulic Steel Pipes Made? A Complete Guide to the Manufacturing Process

Hydraulic steel pipes are designed to transport pressurized hydraulic fluid safely and efficiently,Unlike ordinary mechanical tubing,they must withstand high operating pressures,repeated pressure cycles,vibration,and demanding working environments while maintaining excellent dimensional accuracy and internal cleanliness,
What Is a Hydraulic Steel Pipe? A Complete Guide to Types, Materials, Applications, and Selection

A hydraulic steel pipe is a precision steel tube designed to transport pressurized hydraulic fluid safely and efficiently within hydraulic systems,Compared with ordinary steel pipes,it offers tighter dimensional tolerances,a smoother internal surface,and greater resistance to pressure,vibration,and cyclic loading,
How to Avoid Common Mistakes When Buying Honed Tubes

Buying a honed tube is not simply a matter of comparing prices or matching dimensions,In hydraulic cylinder manufacturing,we have found that many premature cylinder failures are caused by selecting tubes that do not match the application's operating conditions or quality requirements,Although two tubes may look almost identical,differences in material quality,bore accuracy,manufacturing consistency,and inspection standards can significantly affect seal life and equipment reliability,