Steel Line Pipe VS Pipeline

Linepipe is a kind of steel pipe made use of for petroleum, gas, oil, and also water transport. Most of the steel pipelines are used in areas with extreme all-natural conditions, such as polar regions, ice areas, deserts and also oceans, and so on. The lines are lengthy and not easy to maintain, which requested strict high quality demands as well as requirements. The pipeline steel consists of seamless and also bonded steel tubes according to its production approaches and also constructed from high strength carbon steel., which can be stocked chilly, high-sulfur areas or under the sea.

The Advantages Of Steel Linepipe

This linepipe usually has great mechanical residential or commercial properties such as wall surface density, high stamina, high durability as well as use resistance, however likewise should be big diameter, great weldability, low-temperature resistance, corrosion resistance (CO2), seawater resistance as well as HIC, SSCC performance.

High strength

Steel pipe not only calls for high tensile strength and yield strength yet also gives a twisting proportion of 0.85 ~ 0.93.

High impact sturdiness

High impact sturdiness avoids fracturing.

Low ductile-brittle transition temperature level

Rough local and climatic conditions need the pipeline steel to have a completely reduced ductile as well as weak transition temperature level. The shear location of DWTT (decline hammer tear test) has actually ended up being the primary control index to avoid the breakable failure of the pipe, and it is generally needed that the crack shear area of the sample need to be ≥ 85% at the lowest operating temperature.

Excellent hydrogen-induced splitting (HIC) and sulfide tension rust splitting (SSCC) resistance

Excellent welding performance

The Specifications For Steel Pipeline

Currently, the main technical criteria for oil and gas conveying steel linepipes are API SPEC 5L, DNV-OS-F101, ISO 3183 as well as GB/T 9711, etc

. API 5L is a commonly made use of spec developed by the primary petroleum institute, which is only for steel pipe items, excluding the design, choice or installation of pipes.

DNV-OS-F101 (subsea pipe system) is a requirements established by Norske veritas particularly for subsea pipes. It covers a vast array of contents, including pipe design, materials, production, setup, screening, operation, maintenance, etc., which is typically more stringent than API 5L.

ISO 3183 is the worldwide company for standardization established on the oil as well as gas transport steel pipeline delivery conditions, the requirement is comprehensive, comprehensive however does not entail the pipeline style, installment, and so on

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