T/JSAS 071-2024 Active Group standards

T/JSAS 071-2024 Marine high-manganese austenitic steel LNG storage tank technical requirements

Publish Date: 2024-12-23 Implement Date: 2025-01-02 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/JSAS 071-2024

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Chemical equipment

ICS Name: General standards for shipbuilding and marine structures

Publish Date: 2024-12-23

Implement Date: 2025-01-02

Scope

Scope: This document specifies the technical requirements for marine high-manganese austenitic steel liquefied natural gas (LNG) storage tanks (hereinafter referred to as "storage tanks"). This document applies to the design, manufacture, inspection, and acceptance of marine high-manganese austenitic steel LNG storage tanks: The storage medium is LNG fuel; The design steam pressure is not greater than 1.2 MPa, and the design temperature is not lower than -165°C; The storage tank type is a horizontal C-type independent fuel tank. This document applies to high-manganese austenitic steel plates with a thickness of 6 mm to 40 mm. Other thicknesses of steel plates should be approved by the classification society. C-type independent liquid cargo tanks used for transporting LNG or low-temperature liquefied gases with a boiling point higher than -165°C can be used for reference; steel vacuum-insulated storage tanks consisting of a tank, shell, and interlayer, etc., where the tank can be used for reference. This document does not apply to storage tanks for loading liquid ammonia. Main technical content: 4. Basic parameters and structural types 4.1 Basic parameters The basic parameters of the storage tanks are shown in Table 1. Table 1 Basic parameters of storage tanks Design steam pressure MPa Design temperature °C Geometric volume m3 ≤ 1.2 ≥ -165 1~5000 Note: For sea-going vessels, the design steam pressure should not exceed 1.0 MPa. 4.2 Structural types 4.2.1 Structural types of storage tanks The storage tanks are generally composed of heads, shells, supports, lifting lugs, anti-floating devices, gas chambers, manholes, liquid collection tanks, reinforcing rings, vacuum rings, and anti-surge bulkheads. The storage tanks are equipped with corresponding ports and pipelines according to the requirements of the process system. Ladders and platforms are provided in the manhole area. The outer surface of the storage tanks is covered wi