GB/T 33976-2017 in English

National Standard of the People's Republic of China GB/T 33976—2017

Corrosion resistant hot rolled section steel for cargo oil tanks

1. Scope and applicability of the standard

This standard specifies the grade representation method, ordering content, size and shape, weight tolerance, technical requirements, test methods and inspection rules for corrosion resistant hot rolled section steel for cargo oil tanks of crude oil tankers.

2. Normative reference documents

3. Brand indication and classification

The brand consists of two parts: steel grade symbol (A, B, D, E, etc.) and use identification (RCU, RCB, RCW). For example, AH36-RCW is suitable for the upper deck and inner bottom area of cargo oil tanks.

4. Ordering Content

• Standard No.: GB/T 33976—2017
• Product Name: Corrosion-resistant hot-rolled steel for cargo oil tanks of crude oil carriers
• Grade: A, B, D, E, etc.
• Specification: Specific size and type

5. Technical Requirements

5.1 Chemical Composition

The chemical composition shall comply with the provisions of Table 2, and the carbon equivalent shall be controlled at ≤0.40%.

5.2 Mechanical properties

5.3 Corrosion resistance

The steel section shall pass the corrosion test simulating the upper deck and inner bottom plate area of the cargo oil tank, and the weight loss rate shall be ≤2mm/a.

6. Implementation suggestions

1. Material selection:Select the appropriate grade and use mark according to the cargo oil tank environment.
2. Quality inspection:Carry out chemical composition, mechanical properties and corrosion resistance tests according to the standards.
3. Construction suggestions:Ensure welding quality and surface treatment to improve durability.