The cold working methods of steel pipes mainly include cold drawing and cold rolling. The raw materials of cold-rolled steel pipes can be hot-rolled seamless steel pipes or welded pipes. The common characteristics of the cold working method of steel pipes are high dimensional accuracy and good surface roughness. It can produce very thin (up to 0.05~0.01mm) thin-walled tubes and very thin (up to 0.3~0.1 mm in diameter) capillaries.
Precision Steel Tube,Cold Drawn Steel Pipe,Cold Rolled Steel Pipe,Precision Seamless Tube Shandong Guanzhou Iron and Steel Group Co., Ltd. , https://www.guanzhousteel.com
Generally, the production process of seamless Steel Pipe can be divided into cold rolling and hot rolling. The appearance of cold-rolled seamless steel pipe is shorter than that of hot-rolled seamless steel pipe. The wall thickness of cold-rolled seamless steel pipe is generally smaller than that of hot-rolled seamless steel pipe. But the surface looks brighter than that of thick wall seamless steel pipe. The surface is not too rough, and the diameter is not too much burr.
In order to obtain seamless pipes with smaller size and better quality, cold rolling, cold drawing or a combination of the two methods must be used.
High precision cold drawn precision steel pipe is a new type of steel pipe, which is mainly characterized by high precision. There are usually two production processes of two high mill and three high mill. The precision of three high mill in producing cold rolled seamless steel pipe is higher, which can be controlled within a few wires, but the price is relatively higher.
The product specification range of cold rolled steel pipe is: outer diameter 4.0 ~ 450mm; The wall thickness is 0.04 ~ 60mm. Compared with the cold drawing method, the advantage of the periodic cold rolling method is that the shrinkage of the pass surface is large, there is no need for difficult head, and the yield is high.
Factory Price Car A/C R134A Recharging and Refrigerant Recovery Machine
AC Refrigerant Recovery Machine HW-980
The HW-980 is a high-performance AC refrigerant recovery machine designed for efficient and safe handling of automotive air conditioning systems. This unit supports recovery, vacuuming, and charging functions in one compact device, making it ideal for both professional technicians and DIY users.
**Main Features:**
- Recovery, vacuum, and charge functions in one system
- Fully automatic operation for ease of use
- Automatic drainage of compressor oil to ensure optimal performance
- LCD display for real-time monitoring and user-friendly interface
- Operation and service prompts to guide the user through each step
- High and low pressure protection for enhanced safety
- Larger cylinder capacity for increased efficiency and reduced downtime
- Automatic purge of non-condensable gases to improve system performance
- Equipped with a fan and condenser for better cooling and faster recovery
**Technical Parameters:**
- Input Power: 750W
- Recovery Capacity: 450g/min
- Charge Capacity: 1000g/min
- Vacuum Capacity: 5.4m³/h
- Cylinder Capacity: 15kg
- Net Weight: 70kg
- Dimensions (L x W x H): 1240 x 740 x 640 mm
This machine is built for durability and reliability, featuring a robust design that can withstand daily use in demanding environments. The large cylinder and efficient vacuum pump make it perfect for quick and effective refrigerant management. Whether you're working on a single vehicle or managing multiple units, the HW-980 ensures precision, speed, and safety.
With its intuitive controls and advanced safety features, the HW-980 is an essential tool for any workshop or service center looking to streamline their AC servicing process.
[Image: Factory Price Car A/C R134A Recharging and Refrigerant Recovery Machine]
[Image: Factory Price Car A/C R134A Recharging and Refrigerant Recovery Machine]