GB/T 40502-2021 Technical requirements for active draghead

GB/T 1800.1-2020 Geometrical product specifications (GPS)—ISO code system for tolerances on linear sizes—Part 1:Basis of tolerances, deviations and fits GB/T 1800.2-2020 Geometrical product specifications(GPS)—ISO code system for tolerances on linear sizes—Part 2:Tables of standard tolerance classes and limit deviations for holes and shafts GB/T 8923.1-2011 Preparation of steel substrates before application of paints and related products—Visual assessment of surface cleanliness—Part 1:Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings GB/T 11345-2013 Non-destructive testing of welds—Ultrasonic testing—Techniques,testing levels,and assessment GB/T 19418-2003 Arc-welded joints in steel—Guidance on quality levels for imperfections GB/T 13342-1992 General specification of reciprocating hydraulic cylinder for ship GB/T 13342-2007 Specification for marine reciprocating hydraulic cylinder GB/T 19804-2005 Welding—General tolerances for welded constructions—Dimensions for lengths and angles—Shape and position GB/T 34677-2017 Anticorrosive coatings for subsea production systems CB/T 4231-2013 Ship painting technical requirements