Onshore Pipeline: A Complete Selection Guide

Ⅰ. Onshore Pipeline: The Core Carrier of Land Transportation

Onshore steel pipeline is long-distance transmission pipelines laid on the surface or underground of land. Different from offshore pipelines, they have the characteristics of convenient construction, low maintenance cost, and strong adaptability. Its core components include steel pipes, valves, pump stations, etc., which can transport a variety of media such as oil, natural gas, and water, covering scenarios such as oil and gas field gathering and transportation, urban energy supply, and cross-regional water transfer. According to the use and technical requirements, a variety of sub-types are derived:

· Seamless Onshore Pipe: Made with seamless technology, the pipe wall has no welded joints, with better pressure resistance (up to 25MPa) and sealing, suitable for harsh environments such as high-pressure gas transmission and shale gas mining.

· lsaw steel pipe : Pipe diameter ≥ 600mm, used for high-flow transportation, such as the annual transmission volume of a single pipe of a long-distance crude oil pipeline can reach more than 50 million tons.

Ⅱ. Diversified applications: covering energy and people’s livelihood

1. Energy transportation: Main gas pipeline supports urban arteries

Main Gas Pipe As the main line of the natural gas transmission network, it undertakes long-distance and large-scale gas transmission tasks. For example, the main onshore gas pipeline of the West-East Gas Transmission Project.

Its advantages are:

· High-pressure transmission (design pressure 10MPa) reduces energy consumption and improves efficiency.

· Intelligent monitoring systems provide real-time early warning of leaks to ensure safety.

2. Water resource allocation: Water transmission pipelines connect people’s livelihood

Water Transmission Pipeline Focuses on the transportation of drinking water, industrial water and agricultural irrigation water. A typical example is the onshore water transmission pipeline of the South-to-North Water Diversion Project. 

Modern water pipelines pay more attention to:

· Anti-corrosion coating of the inner wall to ensure water quality safety.

· Large-diameter design to achieve large-flow water delivery and reduce engineering costs.

3. Onshore Pipeline Construction: Full-process Technical Guarantee

From exploration to commissioning, onshore pipeline construction covers:

· Route planning: Optimize the route through the GIS system to avoid ecological protection areas and geological disaster areas.

· Pipeline trench excavation: Mainly mechanical excavation, and the depth is designed according to the requirements of frozen soil and load.

· Pipeline laying: Seamless steel pipe welding, large-diameter pipelines use internal joints to ensure accuracy.

· Anti-corrosion treatment: The outer coating (such as 3LPE) is combined with cathodic protection to extend the service life to more than 50 years.

· Pressure test commissioning: Water pressure test to ensure no leakage, and the supporting SCADA system to achieve remote monitoring.

Ⅲ. Technical advantages: efficient, safe and sustainable

1. Material and process upgrade

· Seamless steel pipe: eliminate weld defects, improve fatigue resistance by 30%, suitable for earthquake-prone areas.

· Lsaw steel pipe: reduce the number of pumping stations and reduce energy consumption. For example, the China-Russia East Line Natural Gas Pipeline uses a 1420mm pipe diameter, which increases gas transmission efficiency by 20%.

2. Anti-corrosion and life guarantee

Coating technology is the “protective armor” of onshore steel pipeline:

· fbe steel pipe: 300-500μm dense coating, anti-cathode stripping (stripping distance ≤3mm at 65℃ and 1.5V voltage), widely used in main gas pipelines.

· 3pe steel pipe: bottom layer FBE + middle rubber layer + outer layer PE, resistant to soil stress cracking, suitable for rocky soil or frozen soil areas.

· Inner coating technology: food-grade epoxy resin is applied to the inner wall of the water pipeline to reduce scale adhesion and reduce head loss by 15%.

3. Balance between environment and economy

· The construction cost of pipeline onshore is 60%-70% lower than that of offshore pipelines, and the construction period is shortened by 40%.

· Convenient maintenance throughout the life cycle, and the inner wall corrosion can be detected by intelligent pipe cleaning devices (with an accuracy of 0.1mm), reducing the loss of outages.

IV. Future trends: intelligence and greening

With the advancement of Industry 4.0 and carbon neutrality goals, onshore pipeline is developing in the following directions:

· Intelligence: Equipped with fiber optic sensors to monitor pipeline strain, and AI algorithms to predict leakage risks.

· Green manufacturing: Adopting sandblasting-free rust removal technology, and coating materials with low VOC emissions.

· Composite material application: Carbon fiber reinforced plastic (CFRP) and steel pipes are composited to improve corrosion resistance and lightweight levels.

Ⅴ. Conclusion: Onshore piping drive efficient circulation of land resources

From the main gas pipelines for high-pressure gas transmission to the water pipelines for cross-domain water transfer, from seamless onshore pipelines with precision technology to large-diameter pipelines for efficient transportation, onshore piping have become the core infrastructure for energy interconnection and people’s livelihood security through continuous technological innovation. The full process control of onshore pipeline construction ensures the safety and reliability of every inch of the pipeline.

As a professional pipeline solution provider, Allland steel pipe provide a full range of products covering seamless steel pipes and large-diameter pipes, with 3LPE/FBE coatings and intelligent monitoring systems to help customers achieve efficient and safe transportation of land resources. Contact us now to obtain the quotation and unlock more new possibilities for industrial transportation!