• Seamless steel tube for transmission of fluids System 1
Seamless steel tube for transmission of fluids

Seamless steel tube for transmission of fluids

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Standard:
GB/T8163 Chinese national standard
Application:
General seamless steel tubes for conveying fluids
Models of major steel tubes:
10.20,Q345,etc.

Diamensional tolerances:

Types of steel tubes

Outer diameter

Wall thickness

Cold-rolled tubes
Tube sizes(mm)

Tolerances(mm)

Tube sizes (mm)

Tolerances(mm)

>30~50

±0.3

≤30

±10%

>50~219

±0.8%

Hot-rolled tubes

>219

±1.0%

>20

±10%

Mechanical properties:

Standard codes
Models of steel tubes

Tensite strength(MPa)

Yield strength(MPa)

Elongation(%)

GB/T8163

10

335~475

≥205

≥24

20

410~550

≥245

≥20

Q345

490~665

≥325

≥21

Chemical composition:

Standard codes
Models of steel tubes

Chemical compositions(%)

C

Si

Mn

P

S

Cr

Ni

Cu

GB/T8163

10

0.07~0.14

0.17~0.37

0.35~0.65

≤0.035

≤0.035

≤0.15

≤0.25

≤0.25

20

0.17~0.24

0.17~0.37

0.35~0.65

≤0.035

≤0.035

≤0.25

≤0.25

≤0.25

Q345

0.12~0.20

0.20~0.55

1.20~1.60

≤0.045

≤0.045

/

/

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Q:Can galvanized pipe be welded with seamless steel tube? What should I do to connect?
See the galvanized pipe and seamless steel pipe steel that differences in how if the difference is too large then the steel used for two kinds of materials for welding requirements is not the same, do not recommend direct welding, low pressure can be used in high voltage wire, welding on both sides of the same material flange with flange connection.
Q:How are steel pipes installed underground?
Steel pipes are installed underground through a process called trenching, where a trench is dug in the ground according to the desired pipe route. The trench is then prepared by removing any hindrances and ensuring a level base. The steel pipes are laid into the trench, with proper alignment and connections between sections. Once in place, the trench is backfilled with soil, compacted, and any necessary restoration work is done on the surface.
Q:How are steel pipes insulated to prevent freezing?
Steel pipes are commonly insulated to prevent freezing by applying a layer of insulation materials, such as foam or fiberglass, around the pipes. This insulation helps to maintain the temperature of the pipes and prevents heat loss, thus preventing the water inside from freezing during cold weather conditions. Additionally, heat tracing cables can be used along with the insulation to provide an extra layer of protection by supplying heat to the pipes.
Q:Is the PVC tube a plastic tube or a plastic tube?.
PVC is actually a vinyl polymerization substance, whose material is a non crystalline material. Polyvinyl chloride (Poly, Vinyl, Chloride, PVC), it is obviously impossible to steel, we often say that iron and steel, the steel must be the main component of iron, Fe, inorganic. And PVC, polyvinyl chloride, is an organic substance. Therefore, PVC can not be called steel, and PVC constitutes a large number of substances, not confined to the pipe type.
Q:How do you repair a damaged steel pipe?
To repair a damaged steel pipe, the first step is to identify the extent of the damage. If the damage is minor, it can be fixed using a pipe repair clamp or a stainless-steel wrap. For larger damages, a cut and replace method may be necessary, where the damaged section is cut out and replaced with a new piece of pipe. In some cases, welding or soldering techniques may be required. It is important to consult with a professional plumber or pipe repair specialist to ensure the correct repair method is used for the specific situation.
Q:How are steel pipes connected or joined together?
Steel pipes are typically connected or joined together using various methods such as welding, threading, or using mechanical fittings.
Q:Are steel pipes suitable for underground industrial waste disposal?
Due to their durability and strength, steel pipes find frequent use in underground industrial waste disposal. Their ability to withstand harsh underground conditions, such as moisture, pressure, and corrosion, is noteworthy. Furthermore, steel pipes exhibit resistance to chemical reactions, making them well-suited for managing diverse types of industrial waste. In this manner, they can effectively transport and confine hazardous materials, thereby guaranteeing the safety and safeguarding of the environment and its surroundings. Overall, steel pipes are widely acknowledged as a dependable and effective choice for underground industrial waste disposal.
Q:What is the difference between nominal and actual pipe size?
Nominal pipe size refers to the designation used to identify the approximate inside diameter of a pipe, while actual pipe size refers to the measured inside diameter of a pipe. The nominal size is a standardized value, whereas the actual size may vary slightly due to manufacturing tolerances.
Q:How are steel pipes used in the automotive industry?
Steel pipes are commonly used in the automotive industry for various applications such as exhaust systems, fuel lines, and structural components. They provide strength, durability, and resistance to corrosion, making them ideal for withstanding high temperatures and harsh conditions. Steel pipes are essential in ensuring efficient exhaust gas flow, delivering fuel to the engine, and providing structural support to enhance vehicle safety and performance.
Q:Can steel pipes be used for underground stormwater drainage?
Indeed, underground stormwater drainage can utilize steel pipes. These pipes possess durability and boast a high strength-to-weight ratio, rendering them appropriate for subterranean usage. They can endure substantial burdens and fend off corrosion, thus guaranteeing sustained effectiveness within stormwater drainage systems. Furthermore, steel pipes lend themselves to easy welding, facilitating customization and flexibility during both design and installation. Nonetheless, it is imperative to implement adequate corrosion protection measures, such as the application of a protective coating or the utilization of corrosion-resistant alloys, to avert degradation over time. Regular maintenance and monitoring are also advisable to uphold the pipes' integrity and ensure optimal stormwater drainage functionality.

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