GB/T 42669-2023Corrosion resistant bulb flats for cargo oil tanks (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

1 Scope

This document specifies the grade representation method, ordering content, size, shape, weight and allowable deviation of corrosion-resistant flat bulb steel for cargo oil tanks of crude oil tankers. differences, technical requirements, test methods, inspection rules, packaging, marking and quality certificates.

This document applies to corrosion-resistant flat bulb steel (hereinafter referred to as flat bulb steel) for cargo tanks of crude oil tankers.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 222 Allowable deviations in chemical composition of finished steel products

GB/T 223.3 Methods for chemical analysis of steel and alloys - Determination of phosphorus content by diantipyrine methane phosphomolybdic acid gravimetric method

GB/T 223.5 Determination of acid-soluble silicon and total silicon content in iron and steel Reduced silicomolybdate spectrophotometry

GB/T 223.9 Determination of aluminum content in steel and alloys Chromium Azure S spectrophotometry

GB/T 223.11 Determination of chromium content in steel and alloys by visual titration or potentiometric titration method

GB/T 223.12 Methods for chemical analysis of steel and alloys - sodium carbonate separation-diphenylcarbazide photometric method for determination of chromium content

GB/T 223.14 Methods for chemical analysis of steel and alloys - Determination of vanadium content by tantalum reagent extraction photometry

GB/T 223.18 Methods for chemical analysis of steel and alloys. Separation of sodium thiosulfate-Determination of copper content by iodometric method

GB/T 223.19 Chemical analysis method for steel and alloys - Determination of copper content by new cuproline-chloroform extraction photometry

GB/T 223.23 Determination of nickel content in steel and alloys by diacetyl oxime spectrophotometry

GB/T 223.26 Determination of molybdenum content in steel and alloys Thiocyanate spectrophotometry

GB/T 223.40 Determination of niobium content in steel and alloys by chlorosulfenol S spectrophotometry

GB/T 223.54 Determination of nickel content in steel and alloys by flame atomic absorption spectrometry

GB/T 223.58 Methods for chemical analysis of steel and alloys - Determination of manganese content by sodium arsenite-sodium nitrite titration method

GB/T 223.59 Determination of phosphorus content in steel and alloys bismuth phosphorus molybdenum blue spectrophotometry and antimony phosphorus molybdenum blue spectrophotometry

GB/T 223.60 Chemical analysis methods for steel and alloys Determination of silicon content by perchloric acid dehydration gravimetric method

GB/T 223.61 Methods for chemical analysis of steel and alloys - Determination of phosphorus content by ammonium phosphomolybdate volumetric method

GB/T 223.63 Determination of manganese content in steel and alloys - Sodium (potassium) periodate spectrophotometry

GB/T 223.64 Determination of manganese content in steel and alloys by flame atomic absorption spectrometry

GB/T 223.67 Determination of sulfur content in steel and alloys by methylene blue spectrophotometry

GB/T 223.68 Methods for chemical analysis of steel and alloys - Determination of sulfur content by potassium iodate titration after combustion in tube furnaces

GB/T 223.69 Determination of carbon content in steel and alloys - Combustion gas volume method in tubular furnaces

GB/T 223.71 Methods for chemical analysis of steel and alloys - Determination of carbon content by gravimetric method after combustion in tubular furnaces

GB/T 223.72 Gravimetric method for determination of sulfur content in steel and alloys

GB/T 223.74 Chemical analysis methods for steel and alloys - Determination of uncombined carbon content

GB/T 223.76 Methods for chemical analysis of steel and alloys - Determination of vanadium content by flame atomic absorption spectrometry

GB/T 223.78 Methods for chemical analysis of steel and alloys - Curcumin direct photometric method for determination of boron content