GB 8335-87 Cylinder Threads
The GB 8335-87 standard is a Chinese industrial standard that defines the standard of threads used on the cylinders. Cylinders are often used in applications that require a secure connection while still allowing liquid transfer. Examples of applications are compressed air cylinders, oxygen cylinders, and liquid petroleum gas cylinders. The valves used in these applications must be screwed onto the cylinders in order for them to be used correctly and safely. This is why defined thread standards are important, so that the threads of the cylinders correctly match up with the threads of the valves.
The GB 8335-87 standards define the threads used on the cylinders as metric threads. This standard is also known as the “Metric Thread Gaging for Cylinder Standard.” It defines both the major diameter of the thread and the pitch of the thread. The major diameter is the diameter of the external thread, while the pitch is the axial distance between each pair of threads. These dimensions are important for determining the true size and threading of the cylinder.
The threads of the cylinders are usually made of steel. In order to ensure that the threads maintain their specification, they need to be hardened. The GB 8335-87 standard specifies the requirements for the heat treatment and its hardness. In order for the threads to maintain their accuracy, they need to be protected from corrosion and oxidation. Corrosion and oxidation can change the size and shape of the threads, making them less able to thread into valves properly. The GB 8335-87 states that the cylinders must be treated with oil or paint in order to protect them from corrosion and oxidation.
It is important that the threads of the cylinders comply with the GB 8335-87 standard in order for them to maintain their shape and ensure a secure connection. By ensuring that the threads of the cylinders comply with the standard, manufacturers can ensure that the cylinders are safe and will work properly in the applications they are used in. The threads will also last longer and resist wear and tear due to the correct heat treatment and protection that the standards require.
