Views: 6 Author: Site Editor Publish Time: 2023-11-19 Origin: Site
Butt welding fittings are an important component of pipeline systems. Due to their wide range of dimension that can be produced and suitable for various design requirements of pipeline systems, they are usually used to petroleum, industry, power, marine engineering, and food processing. The quality of butt welding fittings are related to the safety and reliability of the entire pipeline system. Whether the dimension of butt welding fittings meets the standard requirements is an important indicator for inspecting the quality of butt welding fittings.
Standard For Dimension Inspection Of Butt Welding Fittings
To ensure the quality of butt welding fittings, provide evidence for testing, and ensure the safe and reliable operation of pipeline systems, countries around the world have formulated detailed standards for the production of butt welding fittings.The ASME B16.9 being the most widely used,this standard specifies parameters such as outer diameter, inner diameter, wall thickness, and tolerances for butt welding fittings.
Tolerance:
Inspection 14" STD 90DEG Elbow LR：
The 90DEG LR ELBOW is produced according to ASME B16.9 Standard, it covers overall dimensions, tolerances, ratings, testing, and markings for factory-made wrought butt welding fittings in sizes NPS 1 ∕ 2 through NPS 48 (DN 15 through DN 1200). It covers fittings of any producible wall thickness.
90DEG Elbow LR 14" STD in millimetre size is :
OD：355.6mm；
ID：336.5mm;
Wall Thickness：9.53mm；
Center to End：533mm。
The tolerance is stated in ASME B16.9 as following:
OD:355.6+4mm/-3.2mm；
ID：336.5±3.2mm；
Wall Thickness：8.3-10.7mm（±12.5%）；
Center to End：533±2mm。
Inspection 2" SCH80 Equal Tee：
Equal Tee 2" SCH80 in millimetre size is ：
OD:60.3mm；
ID:49.2mm;
Wall Thickness:5.54mm；
Center to End:64mm。
The tolerance is stated in ASME B16.9 as following:
OD:60.3+1.6mm/-0.8mm；
ID：49.2±0.8mm；
Wall Thickness:4.85-6.23mm（±12.5%）；
Center to End:64±2mm。
Importance
The dimension inspection of butt welding fittings is one of the important items in the quality inspection.
Ensure the operation of the pipeline
Ensuring the safety of pipeline
Ensuring the efficiency of pipeline
Tools
Vernier caliper；
Micrometer；
Laser measuring instrument；
Image measuring instrument；
Ultrasonic measuring instrument.
These instruments are often used for inspection butt welding fittings.
In conclusion,the dimension inspection of butt welding fittings is one of the important links to ensure their quality and performance. In the actual testing process, it is necessary to choose appropriate measurement methods and tools based on the actual situation for testing.
