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 Identify Early Signs of Oil Casing Failure

Oil casing provides structural support and helps maintain well integrity throughout drilling and production,When casing or related well barriers deteriorate,the consequences may include leakage,operational interruptions and increased safety risks,However,casing damage is not always visible at the surface,and early warning signs do not necessarily confirm a failure,
How Is Oil Casing Quality Verified Before Delivery

Oil casing quality must be verified against the requirements agreed for the order,including steel grade,dimensions,connections,inspection scope and documentation,Before shipment,buyers need to know not only whether the product has been inspected,but also whether the required tests are complete,the results meet the specified acceptance criteria,and the records correspond to the supplied materials,
How to Reduce Casing Damage During Cementing Operations

Casing damage during cementing can complicate well construction,delay subsequent operations and raise concerns about well integrity,Although cementing helps support the casing string and isolate formations,the operation involves mechanical loads,fluid pressure and coordination between drilling and cementing teams,
How Is Oil Casing Manufactured? A Guide to Production and Quality Control

Oil casing is a critical component of an oil or gas well,Installed inside the wellbore,it supports the well structure and provides a barrier that can be cemented in place to isolate formations,Its performance depends on material properties,dimensional accuracy,connection integrity and compliance with the applicable product specification,For drilling contractors,project engineers and procurement teams,understanding the oil casing manufacturing process helps clarify which production stages and inspection records matter when evaluating a supplier,
How to Inspect Hollow Sections After Installation and During Maintenance

Steel hollow sections are widely used in buildings,industrial facilities,canopies and other structural applications,Once installed,their condition can change due to weather exposure,coating damage,impact,water accumulation or changes in service conditions,