In the electric heating tube, the heating tube mounting thread is the most common for us. In the heating tube, the heating tube mounting thread generally functions as a fixed connection.
Generally, the heating pipe installation thread is divided into metric thread, generally indicated by "M", inch thread, generally indicated by "G", the pipe thread is generally made of inch thread, the thread angle is 55 degrees, and the angle of the metric thread is 60 degrees.
Metric threads are expressed in terms of pitch, and US and British threads are expressed in terms of the number of threads per inch, which is the biggest difference.
In the manufacturing process of the heating pipe, the general fasteners are all made of metric thread, so most of the fasteners are expressed as "MXX*XX", for example: "M12*1.5", which means: fasteners The thread has a diameter of 12 mm and a tooth pitch of 1.5 mm. Generally in the heating tube, the size of the fastener is matched according to the size of the tube. Specific reference can be given to the article: the relationship between the heating pipe fastener and the pipe diameter.
In the case of the threaded flange heating tube, the pipe thread of the inch type is generally used, so the thread of the thread is represented by "GXX", for example: "G11/2", which means: 1.5 inch Pipe teeth. Standard pipe sizes often used: DN15 (4 in.), DN20 (6 in.), DN25 (1 in.), DN32 (1 in 2), DN40 (1 in.), DN50 (2 in) , DN65 (2 inch half pipe), DN80 (3 inch pipe), DN100 (4 inch pipe), DN125 (5 inch pipe), DN150 (6 inch pipe), DN200 (8 inch pipe), DN250 (10 inch pipe) . Commonly used pipe teeth corresponding to the number of teeth per inch and the thread spacing and thread diameter reference article: threaded flange pipe thread diameter, pitch table.
