Steel Pipes
API Pipe Chart
API Pipe Chart
1) Steel-making. This step is in order to get the steel billet that will be used for producing steel pipe. The quality of steel billet is directly up to the quality of steel pipe. So steel-making is a key chain for getting high quality steel pipe.
2) Heating billet. The steel billets should be put into the annular furnace as different heat numbers. And the workers must record the exact heating time and heating temperature. Especially the heating temperature is very important for the quality of pipe.
3) Piercing, rolling, sizing and straightening. The four steps are continuously after these the blank pipes can be gotten.
4) Heat treatment. Heat treatment can improve the mechanical properties of pipes. However, controlling the heat temperature strictly is very important during this step. Overheating will destroy the metal structure and mechanical properties of pipes.
5) The second sizing and straightening. The size and straightness of pipes are probably affected due to the heat treatment so the second sizing and straightening are necessary.
6) NDT and Hydrostatic test. These tests can guarantee the pressure and no leak of the pipes.
7) Cutting & beveling, visual and dimensional inspection which will guarantee the size and length of pipes can meet customers’ requirements.
8) Coating &marking and package. After this step the finished pipes will be prepared for shipment.
1) Steel-making. This step is in order to get the steel billet that will be used for producing steel pipe. The quality of steel billet is directly up to the quality of steel pipe. So steel-making is a key chain for getting high quality steel pipe.
2) Heating billet. The steel billets should be put into the annular furnace as different heat numbers. And the workers must record the exact heating time and heating temperature. Especially the heating temperature is very important for the quality of pipe.
3) Piercing, rolling, sizing and straightening. The four steps are continuously after these the blank pipes can be gotten.
4) Heat treatment. Heat treatment can improve the mechanical properties of pipes. However, controlling the heat temperature strictly is very important during this step. Overheating will destroy the metal structure and mechanical properties of pipes.
5) The second sizing and straightening. The size and straightness of pipes are probably affected due to the heat treatment so the second sizing and straightening are necessary.
6) NDT and Hydrostatic test. These tests can guarantee the pressure and no leak of the pipes.
7) Cutting & beveling, visual and dimensional inspection which will guarantee the size and length of pipes can meet customers’ requirements.
8) Coating &marking and package. After this step the finished pipes will be prepared for shipment.
