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Boiler and Pressure Vessel Steel

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Boiler and Pressure Vessel Steel

Welding gas bottle steel is dedicated used to manufacturing steel welded gas bottles for repeatedly holding liquefied petroleum gas under normal atmospherical temperature (-40~60℃) with a test pressure of 3. 2MPa.

Steel welded gas bottle is the category II and III pressure vessel strictly controlled by the National Boiler and Pressure Vessel Safety Supervisory Bureau, which is directly related to customer safety, and the certification (production license) shall be revised every 5 years.

The steel for boiler and pressure vessels is mainly divided into three categories: the first category is medium and normal pressure vessel steel such as Q245R、Q345R、15CrMoR, which are mainly applied in civil boilers and ordinary industry boilers; the second category is low temperature pressure vessel steel such as 16MnDR、15MnNiDR, which are mainly used in locomotive and chemical machinery industry; the third category is hardening and tempering high strength steel such as 12MnNiVR, which is mainly applied in special industries such as boiler of the power station and nuclear power station.

Delivery Standard and Application

Product TypeSteel GradesDimension(mm)Technical AgreementApplication
Welded gas cylinder steelHP235( P235S)2~25.4 ×1000~2000GB 6653-2017  Welded gas cylinder sheet and stripWelded gas cylinder
HP265
HP295
HP325
Boiler and vessel steelQ245R2~25.4 ×1000~2000GB 713-2013 Boiler and pressure vessel steelBoilerplate, chemical agent vessel, and oil tank, etc (need to be certified)
Q345R
Heat resistant steel15CrMo2.0~ 25.4 ×1000~2000Technical specificationMedium and high-temperature boiler, structural parts, etc
12Cr1MoV2.0~ 25.4 ×1000~2000Technical specification
SA387Gr11-23.0~ 25.4 ×1000~2000Technical specification

Product Precision

Thickness: the thickness deviation of the sheet shall conform to the higher precision requirement in table 5 of GB/T 709.

Thickness: the thickness deviation of the sheet shall conform to the higher precision requirement in table 5 of GB/T 709.

Width: 0-6mm for the sheet with side trimming, the width shall be controlled by the mill for the sheet without side trimming.

Profile: sheet unflatness≤6mm within 1000mm.

The stress shall be released through high straightening force and high deformation force.

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