ERW steel pipe specification & size measurement method:
1) Measuring method of outer diameter of ERW steel pipe:
The outer diameter of the steel pipe refers to the distance between the two sides of the pipe wall. The measurement method is as follows:
1. Diameter measurement method
Place the steel pipe on a flat surface, and then use a caliper or ruler to measure the diameter. This method is suitable for measuring small-diameter steel pipes.
2. Perimeter measurement method
Use a thin wire or a soft tape to wrap around the steel pipe, determine the length of the winding, and then calculate. This method is suitable for measuring large-diameter steel pipes.
2) Measurement method of wall thickness of ERW steel pipe:
Steel pipe wall thickness refers to the difference between the pipe diameter and the actual thickness of the pipe wall. The measurement method is as follows:
1. Direct measurement method
Use calipers to measure the outer diameter and inner diameter of the steel pipe, and then divide the difference by 2 to get the wall thickness of the steel pipe.
2. Falling object method
This method is used to measure steel pipes with thin wall thickness. First, select a point on the steel pipe, then let the weight fall freely, measure the free falling time of the falling object, and calculate the wall thickness of the steel pipe.
3) Measuring method of ERW steel pipe length:
Measuring the length of steel pipe requires the use of measuring tools and auxiliary tools. The specific measurement methods are as follows:
1. Direct measurement method
To measure the length of a steel pipe using a tape measure or scale, you need to first place the steel pipe on a flat surface and then use a tool to measure it.
2. Sine theorem method
Tilt the steel pipe so that it forms a hanging state, and then use the sine law to calculate the length. This method is suitable for measuring some relatively long steel pipes.
Conclusion:
The specification measurement methods of ERW steel pipe include outer diameter, wall thickness and length. Different measurement results can be obtained using different measurement methods. If you need to accurately measure the specifications of ERW steel pipes, you need to choose the corresponding measurement method according to actual needs to obtain accurate steel pipe specification information.
