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Screw (thread)Tension/compressionAir-tightness (sealability)Slim designStructure

Element Technology

Special Screws (T&C, Integral) with High Air-tightness

A pair of steel tubes are connected by threaded joints, which demonstrate excellent air-tightness (sealability), preventing fluid leakage, even under high tensile/compressive stress!

Solution Point

  • Structure that connects pairs of steel tubes with threaded joints, maintaining excellent air-tightness (sealability) under environments where high tensile/compressive stress is applied to the screws.
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Features 01

Expected Problems
?Do you need a thread joining technology that requires the same (or almost the same) tensile/compression performance as the base material?
?Do you need to strengthen liquid or gas leak prevention?
?Do you need a slim design in the threaded joint structure?

Features 02

Technology highlight
Point (1): Design of thread profile
Point (2): Tightening management method

Maintains high air-tightness by combination of the above 2 points.
高気密性鋼管用ねじ図表

Features 03

Proposed Solutions (Examples)
As characteristics of the use environment of threaded joints used in connections of Oil Country Tubular Goods (OCTG) in oil and gas development, it is necessary to prevent leakage of the product fluid in the tubes while under high internal and external pressure. The various types of threaded joints (screws) developed by 91视频 Steel assume diverse service environments, and have an extensive record of use in countries around the world.
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