Fluid seamless pipe is a seamless steel pipe used to transport liquids and gases

Posted by BAOWI STEEL MANUFACTURING CO.,LTD on September 12th, 2024

Fluid seamless pipe is a seamless steel pipe used to transport liquids and gases. They are widely used in petroleum, chemical, electric power, construction and other fields due to their excellent mechanical properties and corrosion resistance. Here are some important knowledge about fluid seamless pipes:

### 1. **Basic definition**
- **Seamless pipe**: Seamless pipe is a pipe made by hot rolling or cold drawing process, without welding seams, usually with higher strength and better pressure resistance.
- **Fluid pipe**: Pipes specially designed for conveying fluids (such as water, oil, gas, etc.), usually require good corrosion resistance and pressure resistance.

### 2. **Material**
- Fluid seamless pipes are usually made of carbon steel, stainless steel or alloy steel. Common materials are:
- **Q235**: Low alloy steel, suitable for general fluid transportation.
- **20#, 45#**: Commonly used carbon steel materials, suitable for occasions with medium strength requirements.
- **304, 316**: Stainless steel materials, suitable for highly corrosive environments

### 3. **Specifications and standards**
- **Specifications**: The specifications of fluid seamless pipes usually include outer diameter, wall thickness and length. Common outer diameters range from 6mm to 600mm, and wall thicknesses range from 1mm to 30mm.
- **Standards**: Common national and international standards include:
- **API 5L**: Seamless pipe standard for oil and gas transportation.
- **ASTM A106**: Carbon steel seamless pipe for high temperature and high pressure environments.
- **GB/T 8162**: National standard for seamless pipes for structures.

### 4. **Application areas**
- **Oil and gas industry**: Used for transporting crude oil, natural gas and its derivatives.
- **Chemical industry**: Used for transporting various chemical media.
- **Power industry**: Used for piping systems for boilers, heat exchangers and other equipment.
- **Construction industry**: Used for water supply, drainage and HVAC systems.

### 5. **Manufacturing process**
- **Hot rolling**: Forming the pipe by heating the billet to a high temperature and then rolling it.
- **Cold drawing**: Forming by stretching at room temperature, usually used to manufacture high-precision and small-diameter pipes.

### 6. **Quality inspection**
- **Appearance inspection**: Check whether the appearance of the pipe has obvious defects.
- **Non-destructive testing**: Such as ultrasonic testing, radiographic testing, etc. to ensure the internal quality of the pipe.
- **Pressure test**: Before leaving the factory, the fluid seamless pipe needs to be pressure tested to ensure that its pressure bearing capacity meets the standard.

### 7. **Maintenance and maintenance**
- Regularly check the appearance and interface of the pipe to ensure that there is no leakage or corrosion.
- Perform anti-corrosion treatment regularly according to environmental conditions.