Stainless Steel Seamless Pipe And Tube

Stainless steel seamless pipes and tubes are essential components in various industries such as energy, automotive, and construction. The benefits of these pipes and tubes are abundant, including:

1. Durability: Stainless steel is resistant to corrosion, rust, and staining, making it an ideal material for long-lasting use.

2. Strength: Stainless steel has a high tensile strength, making it an excellent material for high-pressure applications.

3. Versatility: Due to its corrosion resistance and strength, stainless steel seamless pipes and tubes can be used in various environments, including extreme temperatures and harsh conditions.

4. Aesthetic: Stainless steel has an attractive and clean finish, making it an ideal material for decorative purposes.

5. Low Maintenance: Stainless steel does not require much maintenance, making it a cost-effective option in the long run.

6. Hygienic: Stainless steel is easy to clean and does not harbor bacteria, making it a popular material for use in the food and beverage industry.

In conclusion, stainless steel seamless pipes and tubes offer numerous advantages, making them a highly sought-after material in many different industries. With their durability, strength, versatility, aesthetic appeal, low maintenance, and hygienic properties, it is no wonder that they are the preferred choice for many applications.

Choose Table:

Stainless steel seamless pipe (ss pipe) production process:
 

Simplify the main production process: Round steel → re-inspection → peeling → blanking → centering → heating → perforation → pickling → flat head → inspection and grinding → cold rolling (cold drawing) → degreasing → heat treatment → straightening → pipe cutting (set ruler) → pickling/passivation → finished product inspection (eddy current, ultrasonic, water pressure) → packaging and storage.

1. Round bar cutting:

After receiving the round bar from the raw material warehouse, calculate the cutting length of the round bar according to the requirements of the process, and draw a line on the round bar. After the bow sawing machine is started, the grinding wheel is cut along the segment line, and the cut circle The steel is stacked separately according to the steel type, furnace number, production batch number and specification, and the ends are distinguished by different colors of paint.

 

2. Centering:

When centering the cross-arm drilling machine, first find the center point on a section of the round steel, drill a sample hole, and then vertically fix it on the drilling machine table for centering. The centered round steel is stacked separately according to the steel type, furnace number, specification and production batch number.

 

3. Peeling:

Peeling is carried out after the incoming material has passed the inspection. Peeling includes lathe peeling and whirlwind cutting. Lathe lathe peeling is performed on the lathe with a processing method of one clip and one top. Whirlwind cutting is to hang the round steel on the machine tool Perform whirl cutting.

 

4. Surface inspection:

The quality inspection of the light round steel after peeling is carried out, and the existing surface defects are marked, and the grinding personnel will grind until it is qualified. The round steel that has passed the inspection is stacked separately according to steel type, furnace number, specification and production batch number.

 

5. Round steel heating:

The round steel heating equipment includes a gas-type inclined bottom furnace and a gas-type box-type furnace. The gas-fired inclined-bottom furnace is used for heating when a large batch of incoming materials is supplied, and the gas-fired box-type furnace is used for heating when a small batch of incoming materials is supplied. When entering the furnace, the round steel with different steel types, furnace numbers and specifications is separated by the old outer film. When the round steel is heated, the steel turner uses tools to turn the steel to ensure that the round steel is heated evenly.

 

6. Hot-rolled piercing:

Use piercing unit and air compressor. According to the specifications of the perforated round steel, select the corresponding guide plate and molybdenum plug, use the piercer to perforate the heated round steel, and the pierced waste pipe is randomly put into the water pool for full cooling.

 

7. Inspection and grinding:

Inspect the inner and outer surfaces of the waste pipe to be smooth and flat, and there must be no skins, cracks, interlayers, deep pits, serious thread marks, tower iron, fried sticks, Baotou and sickle heads. The surface defects of waste tubes can be eliminated by local grinding. The waste pipes that have passed the inspection or the waste pipes that have passed the inspection after minor defects have been repaired are bound by the binding workers in the workshop according to the requirements, and stacked separately according to the steel type, furnace number, specification, and production batch number of the waste pipes.

 

8. Straightening:

The raw material pipes from the piercing workshop are packed in bundles. The shape of the incoming raw pipe is bent and needs to be straightened. The equipment used for straightening is vertical straightening machine, horizontal straightening machine and vertical hydraulic press (used for pre-straightening when the bending degree of the steel pipe is large). In order to prevent the steel pipe from bouncing during straightening, a nylon sleeve is used to limit the steel pipe.

 

9. Pipe cutting:

According to the production plan, the straightened raw pipe needs to be cut head and tail, and the equipment used is a grinding wheel cutting machine.

 

10. Pickling:

The straightened steel pipe needs to be pickled to remove the scale and impurities on the surface of the waste pipe. Pickling of steel pipes is carried out in the pickling workshop, and the steel pipes are slowly hoisted into the pickling tank for pickling by a crane.

 

11. Grinding, endoscopic inspection and internal polishing:

pickling qualified steel pipes enter the external surface grinding process, and the steel pipes after grinding are subjected to endoscopic inspection, and internal polishing is required for unqualified products or processes with special requirements deal with.

12. Cold rolling process/cold drawing process

13. Degreasing:

The purpose of degreasing is to remove the rolling mill oil attached to the inner wall and outer surface of the steel pipe after rolling by rinsing, so as to avoid polluting the steel surface during annealing and preventing carburization.

 

14. Heat treatment:

Heat treatment restores the shape of the material through recrystallization and reduces the deformation resistance of the metal. The heat treatment equipment is natural gas solid solution heat treatment furnace.

 

15. Finished product pickling:

After cutting the steel pipe, the finished product pickling is carried out, the purpose of which is to passivate the surface, so that a layer of oxidation protection film is formed on the surface of the steel pipe, and the corrosion resistance of the steel pipe is enhanced.

 

16. Finished product inspection:

 

17. Packing and warehousing:

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