Features of Heavy Thick Steel Pipes

Profile of Heavy Thick Steel Pipes

The main difference between heavy thick steel pipes and thin-walled steel pipes is the thickness of the steel pipe wall. Most thin-walled steel pipes use cold drawing technology, while thick walled steel pipes generally use hot rolling technology. If distinguished by units of measurement, a wall thickness/diameter equal to 0.05 is the watershed between thick walled seamless steel pipes and thin-walled steel pipes, a wall thickness/diameter less than 0.05 is thin-walled steel pipes, and the larger the wall thickness/diameter, the thicker the pipe. In terms of usage, thick walled steel pipes are mainly used for pressure bearing and important pipelines.

Heavy thick steel pipes, as the name suggests, are characterized by their relatively large wall thickness. This feature endows it with many excellent performances. Firstly, its strong pressure bearing capacity enables it to operate stably in high-pressure environments. Thick walled seamless pipes can easily handle high-pressure fluids in oil and gas pipelines, as well as high-pressure reaction media in chemical equipment, ensuring the safety and reliability of transportation and production processes.

Secondly, good mechanical performance is also a major highlight of thick walled steel pipes. It has high tensile strength, yield strength, and impact toughness, and can withstand large loads and impacts.

In addition, heavy thick seamless pipes also have excellent corrosion resistance and high temperature resistance. In industries such as petrochemicals and power, many media are highly corrosive or in high-temperature environments, making it difficult for ordinary pipes to meet the requirements. By selecting appropriate materials, good performance can be maintained in these harsh environments, less susceptible to corrosion and high temperatures, greatly reducing maintenance costs and safety risks.

Features of Heavy Thick Steel Pipes

Heavy thick steel pipes, as the core material in the industrial pipeline field, are widely used and durable due to their excellent comprehensive performance. The following analyzes its unique advantages from ten key characteristics.

1. Pressure Bearing Capacity

With its large wall thickness design, heavy thick seamless pipes can maintain structural stability in high-pressure environments and withstand working pressures ranging from 10MPa to 100MPa. They perform outstandingly in scenarios such as deep-sea oil and gas extraction and high-pressure chemical reactions, and are a safety guarantee for high-pressure fluid transportation.

Size and Weight of SCH 160 Heavy Thick Seamless Pipes

The pipe Schedule describes the pipe wall thickness. In same size, the thickness in mm will be larger while pipe schedule number increases. It just affect the inside diameter only. Usually The double Extra Strong (XXS) wall is thicker than SCH 160 from 1/2″ to 6″, but SCH 160 is thicker than the XXS wall from 8″ to 12″.

The larger the wall thickness parameter, the greater the pressure that the steel pipe can withstand.

2. Excellent Mechanical Properties

It has high tensile strength (generally up to 400MPa-1000MPa), good yield strength and impact toughness, and can withstand severe load impact and long-term fatigue stress, ensuring the stable operation of heavy machinery equipment under complex working conditions.

Mechanical properties of commonly used materials

3. Excellent Corrosion and High Temperature Resistance

By selecting materials such as stainless steel and alloy steel, stable performance can be maintained in harsh environments such as acid alkali corrosion and high temperature oxidation. 316 stainless steel thick walled pipes can serve for a long time in sulfur-containing media, while 15CrMoG alloy pipes can withstand high temperatures above 600 ℃.

4. Specification and Dimensions

In terms of size range, heavy thick steel pipes have a wide selection of specifications. The outer diameter typically ranges from 1/2 inch to 24 inches, with wall thickness ranging from 4mm to 60mm. The length can be customized according to actual needs, with a general length of 6m to 12m. In special circumstances, longer length options may be available. This size range can meet the diverse needs of different industries and scenarios, whether it is the manufacturing of small mechanical components or the laying of large engineering pipelines, suitable specifications can be found.

Dimension of Heavy Thick Steel Pipes

5. Various Material

It covers three major categories: carbon steel (ASTM A160B), alloy steel (ASTM A333, ASTM A335), and stainless steel (SS304, 316, 321), and can be flexibly selected according to working conditions such as pressure, temperature, and medium characteristics.

Chemical Composition

6. Seamless Structural Advantages

The seamless structure formed by the overall rolling process avoids joint defects in welded pipes, eliminates leakage risk points, and ensures safety in high-pressure and high-risk medium transportation.

7. High precision dimensional control

Through the hot rolling and cold rolling composite process, precise dimensional tolerance control is achieved, with small errors in straightness and roundness, ensuring installation and docking accuracy and reducing construction losses.

8. Long term service life

Under standard usage conditions, the service life of heavy thick steel pipes can generally reach 8-20 years. The 16Mn thick walled pipe in the West East Gas Pipeline Project has been operating stably for over 15 years and still maintains good performance.

9. Wide Range of Applications

Covering multiple fields such as oil and gas, chemical, power, machinery, construction, and marine engineering, it can play a core role in everything from drill pipe sleeves to boiler superheaters, from hydraulic supports to bridge structures.

10. Quality Control

The production process undergoes multiple checks including raw material testing, rolling monitoring, heat treatment control, and non-destructive testing (ultrasonic, eddy current testing). Each batch of products meets strict standards such as ASTM A36.10M, API 5L, EN10216-2.

Inspection of Heavy Thick Steel Pipes

Outside Diameter

Thickness

Length

Marking

These characteristics together constitute the core competitiveness of heavy thick steel pipes in the industrial field, making them an indispensable key material in modern industrial systems. Whether it is upgrading traditional industries or emerging engineering construction, thick walled seamless pipes can provide reliable material support.