Do you know the production process of seamless elbows? Next, seamless elbow manufacturers will give you a brief introduction.

Seamless elbow manufacturing technology and online inspection. Due to different manufacturing processes, seamless elbow pipe fittings are divided into hot-rolled (extruded) seamless elbow factory pipe fittings and cold drawn (rolled) seamless elbow pipe fittings. Cold drawn (rolled) pipes are divided into round pipes and special-shaped pipes.

The process flow of seamless elbow manufacturers is briefly introduced, as follows:

1. Cold drawn (rolled) seamless elbow fittings: round billet heating perforation, annealing, pickling, oiling (copper plating), multi-pass cold drawn (cold-rolled) billet heat treatment, straightening, hydraulic test, Logo store. The rolling method of cold drawn (rolled) seamless steel pipe is more complicated than that of hot rolled (extruded) seamless elbow pipe. The first three steps of their production process are basically the same. The difference is that starting from the fourth step, after emptying the round billet, it should be annealed first.

After annealing, use a special acid solution for pickling. After pickling, apply oil. This is followed by some cold-drawn (cold-rolled) tube blanks for special heat treatment. After heat treatment, straighten it. After the steel pipe is straightened, it is sent to the metal flaw detector (or hydraulic test) through the conveyor belt for internal flaw detection. If there are cracks and bubbles on the steel pipe, they will be detected. After the quality inspection of the steel pipes, strictly manual selection. After the steel pipe of the elbow manufacturer has passed the quality inspection, it should be painted with serial number, specification, production batch, etc., and lifted into the warehouse.

2. Hot-rolled (extrusion) seamless elbow accessories: round steel heating perforated three-roll cross rolling, continuous rolling or extrusion, sizing (or shrinking), cooling, straightening and hydrostatic test (or flaw detection) marking storage.

The above is the seamless elbow manufacturing process introduced to you by seamless elbow manufacturers, I hope it will be helpful to you.