9. Seamless steel pipe GB / T8162-1999, steel number: 10 #, 20 #, 35 #, 45 # and 16Mn
(Q345), Specification: 6-720 * 1-70mm
10. Seamless steel pipe for conveying fluid GB / T8163-1999, steel number: 10 #, 20 #, 16Mn (Q345),
Specifications: 6-720 * 1-70mm
11. Low-medium pressure boiler tube GB3087-1999, steel No.: 10 #, 20 #, specification: 6-720 * 1-70mm
12. High-pressure boiler pipe GB5310-1995, steel No.: 20G, specification: 6-720 * 1-70mm.
“and” DN ” -like are used to indicate the diameter, the difference is:
“” marks the diameter of the ordinary circle, or the outer diameter of the pipe multiplied by the wall thickness, such as: φ25×3 marks the outer diameter
Pipe of 25mm and 3mm wall thickness; “DN”: nominal designation for fittings such as pipes and valves
Path, usually close to the inner diameter.It is a standard term established for the purpose of engineering installation facilities.
It means the outer diameter, and DN refers to the inner diameter DN: nominal diameter: outer diameter
Now the tubes- -. like are in inches, millimeters is just a more approximate, easy to remember the number.
For example, the DN50 pipe should be 2 inches, 1 inch =25.4mm, 2 inches should be 50mm,
At this time, the wall thickness of the pipe, the spiral pipe is above 5mm, taking 5mm as an example,
The outer diameter of the DN50 tube should be about 60mm.
Q345 seamless steel pipe is actually a kind of steel pipe material.Q stands for the yield of this material,
It is the first letter of the pinyin, followed by the number 345, which refers to the yield value of this material
At or around 345.And decreases the number as the thickness of the material increases.
Similar class to the naming method for Q235 class.
Q345A，Q345B，Q345C，Q345D，Q345E。This is the distinction of grades, represented by the
Mainly, is the impact of the temperature is different and!
Q345A, no impact; Q345B, 20 degrees temperature impact; Q345C, is 0
Degree impact; Q345D level, is a 20 degree impact; Q345E level, is-40 degree impact.In different
The impact temperature, the impact value is also different..
In the plate, it is a low-alloy series.Of the low-alloy material, this material is the most common.
Q345 seamless steel pipe in a past is called: 16Mn seamless steel pipe.
The external implementation standard of Q345 seamless steel pipe is: GB709, and the internal implementation standard is:
GB/T1591-94
Shandong Jute Steel Pipe Co.,Ltd.
Contacts: Mr. Ji
WhatsApp: +86 18865211873
WeChat: +86 18865211873
E-mail: jutesteelpipe@gmail.com
E-mail: juteguanye@aliyun.com
Post time: Mar-15-2022
