Company News

Hunan Great Steel Pipe Co., Ltd
oil pipe,drill pipe,stainless steel pipe manufacturer,ERW steel pipe provider

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

Latest news list

  • concentric vs eccentric Steel Reducer,Steel Reducer selection,eccentric Steel Reducer orientation,concentric Steel Reducer
    Concentric and eccentric Steel Reducers connect pipes of different nominal diameters,but their geometry affects how they fit into a piping system,Choosing the right type depends on the pipe layout,equipment connections,flow conditions,drainage requirements and approved engineering design,For project buyers,the priority is to specify the correct Steel Reducer configuration and orientation before requesting quotations,A steel pipe fitting that matches the steel pipe sizes may still be unsuitable if its geometry does not meet the installation requirements,
  • steel pipe fitting corrosion,steel tee corrosion,steel elbow corrosion,steel reducer corrosion,corrosion-resistant materials
    Corrosion in steel pipe fittings can lead to wall loss,leakage and unplanned maintenance in industrial piping systems,Steel tees,reducers and elbows may face different exposure conditions depending on the fluid,temperature,material and system layout,Effective corrosion management starts with understanding these conditions rather than relying on the fitting type or material name alone,For project engineers,maintenance teams and procurement professionals,the key is to connect material selection,inspection and corrosion control with the actual service environment,
  • steel pipe fitting thermal expansion and vibration,steel elbow vibration,piping thermal movement,steel tee stress
    Steel tees,reducers and elbows operate as part of a connected piping system,When temperatures change or equipment generates vibration,loads can develop at fittings,joints,supports and equipment connections,If these effects are not properly addressed,the system may experience excessive movement,leakage or fatigue-related damage,Managing thermal expansion and vibration requires more than inspecting an individual fitting,Engineers need to consider the piping layout,operating conditions,support arrangement and the behavior of the complete system,
  • how to choose a steel tee,steel tee selection,steel tee buying guide,equal tee vs reducing tee,steel tee procurement
    Selecting a steel tee for an industrial piping project involves more than matching pipe sizes,The fitting must meet the piping layout,material specification,connection requirements and operating conditions,An incorrect specification can lead to installation delays,additional inspection or costly changes after procurement,For project buyers and engineers,the best starting point is a complete technical inquiry that defines what the piping system requires,
  • Steel Elbow erosion,Steel Elbow wear,piping erosion,Steel Elbow wall thickness inspection,abrasive flow,Steel Elbow inspection
    Steel Elbows redirect flow in industrial piping systems,but this change in direction can make them vulnerable to localized erosion,When fluids carry sand,scale,catalyst particles or other solids,repeated particle impacts may gradually reduce the Steel Elbow wall thickness,Corrosion can accelerate the damage when the fluid is also chemically aggressive,Reducing Steel Elbow erosion starts with identifying the wear mechanism,reviewing operating conditions and tracking wall-thickness changes,The right solution depends on the process,material,fitting geometry and piping design,

Find what you need ?

close
We use cookies and other tracking technologies to improve your browsing experience on our website, to show you personalized content and targeted ads, to analyze our website traffic, and to understand where our visitors are coming from.