How are spiral steel pipes classified based on their working modes?
Irrigation systems using thermally expanded steel pipes for water transmission pipelines can be classified into portable, semi-fixed, and fixed systems according to their operational methods.
Portable Systems: Apart from the water source, both the pipelines and water distribution equipment are mobile. Some pumps are stationary, while others can be moved. The thermally expanded steel pipes are mostly made of plastic film hoses or vinylon-coated plastic hoses, which are effective, cost-efficient, flexible in application, and highly adaptable. However, film hoses are not durable and prone to damage, with a typical lifespan of only 1-2 years. During the late growth stage of tall crops, it is difficult to move the hoses between rows due to the height of the crops.
Semi-Fixed Systems: Parts of the pipeline system are fixed, while others are mobile. Typically, the main pipes are fixed, and the branches are connected to movable plastic hoses to distribute water to the fields. This system has wider intervals between the main pipes and outlets, which reduces the number of fixed pipes and the overall investment per unit area. However, the frequent movement of the plastic hoses across the field during irrigation increases labor intensity and can lead to reduced work efficiency.
Fixed Systems: In low-pressure pipeline irrigation systems, all pipes and water distribution equipment are laid underground and fixed. Water is directly distributed to field channels and canals through water supply sockets or distributors, without the need for plastic hose connections. The field lateral pipes are short, and the fixed spiral steel pipes have a high density and standardized specifications. This system is easy to operate and manage, provides uniform irrigation, but requires a relatively large initial investment.
How to Conduct Safety Management for Spiral Steel Pipes?
To address the issues of displacement and exceeding standards during the assembly of seamless steel pipe fittings, the following preventive measures should be taken:
(1) Use internal centering devices as much as possible.
(2) Conduct accurate measurements and maintenance during assembly.
(3) Classify welded pipe sections by grade during assembly.
(4) Use copper hammers or copper coins for partial correction.
(5) Perform laser cutting to address severe misalignment or deformation.
