GB/T 31945-2015Steel plate for self-elevating drilling units leg structure (English PDF)

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. The standard proposed by China Iron and Steel Association.

1 Scope

This standard specifies the jack-leg with steel grades that way, ordering the content, size, shape, weight and tolerances, technical Operation requirements, test methods, inspection rules, packaging, marking and quality certificate.

This standard applies to the production of jackup leg rack, half board and its accessories, a thickness of not more than 215mm of steel.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 222-2006 finished steel chemical composition and permissible variations

GB/T 223.9 steel and aluminum alloys - Determination of chromium content Azure S Spectrophotometry

Determination of GB/T 223.11 steel and alloy chromium content of visual titration or potentiometric titration

GB/T 223.14 Methods for chemical analysis of iron, steel and alloys, tantalum reagent extraction and spectrophotometric determination of vanadium content

GB/T 223.19 Methods for chemical analysis of iron, steel and alloy neocuproine - chloroform extraction spectrophotometric determination of copper content

GB/T 223.23 steel and alloy - Determination of nickel content dimethylglyoxime spectrophotometry

GB/T 223.26 steel and alloy - Determination of molybdenum content - Thiocyanate spectrophotometric

GB/T 223.40 Determination of steel and alloy niobium content sulphochlorophenol S spectrophotometry

GB/T 223.58 Methods for chemical analysis of iron, steel and alloys of sodium arsenite - sodium nitrite determination of manganese content titration

GB/T 223.59 Steel and Alloy Determination of phosphorus content by bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometry

GB/T 223.60 Methods for chemical analysis of iron, steel and alloy perchloric acid dehydration gravimetric method for the determination of silicon content

GB/T 223.62 Methods for chemical analysis of iron, steel and alloy butyl acetate extraction spectrophotometric determination of phosphorus content

GB/T 223.69 after carbon and alloy steel - Determination of the pipe furnace combustion gas volumetric method

GB/T 223.78 Methods for chemical analysis of iron, steel and alloy Curcumin spectrophotometric determination of boron content directly

GB/T 223.79 multi-element steel Determination X- ray fluorescence spectrometry (Routine method)

GB/T 223.84 steel and titanium alloys - Determination of two methane antipyrine spectrophotometry

After GB/T 223.85 steel and alloy sulfur content induction furnace combustion infrared absorption method

After the determination of GB/T 223.86 total sulfur content in steel and alloy induction furnace combustion infrared absorption method

RT Test Method. Test Part 1 GB/T 228.1 metallic materials tensile

GB/T 229 metal Charpy pendulum impact test method

GB/T 231.1 metallic materials Brinell hardness test - Part 1: Test methods

General provisions GB/T 247 steel sheet and strip packaging, marking and quality certificate

Size GB/T 709-2006 hot rolled steel sheet and strip, shape, weight and tolerance

GB/T 2970 steel plate ultrasonic inspection

GB/T 2975 Steel and steel products for mechanical testing and sample preparation position

GB/T 4336 carbon steel and low alloy steel spark source atomic emission spectrometry method (conventional method)

GB/T 5313 in the thickness direction of the steel plate

GB/T 8170 repair value expressed about the rules and limit values and judgment