JB/T 5000.12-1998 General technical conditions for coating of heavy machinery
Some standard content:
ICS25.220
A29
JB
Machinery Industry Standard of the People's Republic of China
JB/T5000.12-1998
General Technical Conditions for Heavy Machinery|| tt||Coating decoration
The heaw mechanical gener al techniques and standardsCoating
released on 1998-09-30
National Machinery Industry Bureau
released
1998 -12-01 Implementation
JB/T5000.12-1998
Appendix A of this standard is the appendix of the standard
Foreword
Appendix B and Appendix C of this standard They are all appendices to the prompts. This standard is proposed and administered by the Metallurgical Equipment Standardization Technical Committee of the Ministry of Machinery Industry. The unit responsible for drafting this standard: Dazhong Group Company. The organization participating in the drafting of this standard: Xi'an Heavy Machinery Research Institute. The main drafters of this standard: Zhang Lianbin, Wang Yizhong, 1Scope
Mechanical Industry Standards of the People's Republic of China
General Technical Conditions for Heavy Machinery
Coating
Theheavymechanicalgeneral tedhniquesandstandardsCoating| |tt||This standard specifies the technical requirements, inspection and marking for coating of heavy machinery and its parts. This standard applies to the coating of heavy machinery and its parts. JB/T5000.12—1998
When there are no special requirements in product drawings, technical documents or order contracts, they shall comply with the provisions of this standard. 2 Referenced standards
The provisions contained in the following standards shall be adopted. Provisions cited in this standard constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. GB/T5206.1—85
GB/T 5206.4—89
GB/T 5206.5—91
GB 6514—1995
GB7231—87||tt| |GB 769287
GB 7693—87
GB 8264—87
GB 8923—88
GB/T9286—88
GSB G51 001—1994
3 Terms and Definitions
Paints and Varnishes
Vocabulary
Part One:
General Terms
Paints and Varnishes|| tt||Vocabulary
Part 4:
Terms of physical and chemical properties of coatings and coatings
Terms of pathological conditions of coatings and coatings
Paints and varnishes
Vocabulary
Part 5:
Safety regulations for painting operations Painting process safety and basic identification colors and identification symbols for ventilation and purification industrial pipelines Safety regulations for painting operations Safety regulations for painting pre-treatment processes Safety regulations for installation operations Pre-painting treatment process Ventilation and purification Painting technical terms
Cross-hatch test of steel surface corrosion grade and rust removal grade of paint and varnish films before painting
Paint film color standards Sample
The terms used in this standard have the same definitions as GB8264 and GBT5206. 4 Technical requirements
4.1 Surface treatment before painting
The surface of all steel parts that need to be painted must be painted before Before installation, rust, scale, grease, dust, soil, salt and dirt must be removed.
4.1.1 Before rust removal, use organic solvents, alkali solutions, emulsifiers, steam, etc. to remove grease and dirt on the surface of steel parts. 4.1.2 See Table 1 for the methods, grades and application scope of rust removal on the surface of steel parts. State Machinery Industry Bureau approved on 1998-09-30 for implementation on 1998-12-01
1
Rust removal method
Spraying or projecting
Hand and power tools||tt ||Washing
Acid
Rust removal level
GB 8923
Sa2
Sa2 y
Sa3
$2| |tt||$3
Be
SP.6
SP.10
SP.5
SP.2
and| |tt||SP.3
SP.8
JB/T5000.12—1998
Table 1
Scope of application
Accessories or auxiliaries The surface of equipment and steel parts used in mildly corrosive environments; the main components or main equipment of steel parts in contact with or embedded in concrete and the surfaces of steel parts used in highly corrosive environments are subject to long-term damage. Steel parts operating in environments such as tide, humidity, damp heat, salt spray, etc.: Steel parts that are in contact with high temperatures and need to be coated with heat-resistant paint. Surfaces in contact with liquid media or corrosive media, such as oil tanks, reducer cases, and the inside of water tanks. Surface
Any steel parts that are in contact with high temperatures and do not need to be coated with heat-resistant paint; any extremely large steel parts that cannot be shot blasted and rusted due to equipment restrictions; parts of the equipment that have special shapes that cannot be shotpeened and rusted. All kinds of steel pipes;
Thin plates that cannot be shot peened (wall thickness <5mm): medium and small parts with complex structures. 4.1.3 If the welded structural parts require heat treatment after forming, the rust removal process It should be carried out after the heat treatment process. 4.1.4 The projectiles used for spraying (throwing) rust removal can be cast iron (steel) pellets, steel wire cut pellets, etc. The projectiles used should have edges and corners. The diameter of the projectiles used for castings and forgings should not be larger than 2mm. Projectile diameter is 0.6~1.2mm. 4.1.5 The interval between the surface to be coated after shot blasting or manual power rust removal and the application of primer shall not be more than 6 hours (the interval in areas where the relative air humidity is greater than 70% shall not be more than 4 hours). The interval between the surface to be coated and the primer should not be less than 48 hours after pickling and rust removal immediately after pickling and rust removal (the interval should not be less than 72 hours in the cold climate environment of northern winter). There must be no rust or contamination on the surface before painting. 4.1.6 Steel plates and profiles (wall thickness >5mm) used to manufacture structural parts should be shot blasted or shot blasted to remove rust in advance, with a rust removal grade of Sa2Y, and immediately Applying maintenance primer (shop primer) is surface pretreatment before manufacturing. For coating technical requirements, see Table A6 in Appendix A (Standard Appendix). The recommended thickness range is 15~30um. Recommended coating type: inorganic zinc silicate primer Paint, epoxy zinc-rich primer, phosphating primer, iron red epoxy ester primer.
4.1.7 The moisture content of wood products to be painted shall not exceed 42%, and obvious convex and concave, burr, resin, dust, etc. are not allowed on the surface. If necessary, anti-mildew or bleaching and dyeing treatments are required. 4.2 Coating design requirements
4.2.1 Various coating categories, product usage environment, applicable product and component range, recommended coating thickness and coating varieties are shown in Table 2. 4.2.2 Some special parts and components of the product coating technical requirements. 4.2.2.1 The mutual contact surfaces of riveted parts must be coated with anti-rust paint with a thickness of 30 to 40 μm before connection. The paint used is specified in Table 2 for Class A and B primers. The overlapping edges should be sealed with paint, putty or adhesive. Primer damaged due to machining or welding shall be recoated.
4.2.2.2 The inner surface of the unenclosed box-shaped structure, the inner surface of the chute, funnel, skirt board, the inner surface of the counterweight box, the inner surface of the safety cover, etc., which are open during transportation, must be painted with a thickness of 60~80μm anti-rust paint, the coating used is specified in Table 2 for Class A and B primers.
4.2.2.3. Wooden products should be coated with varnish or colored paint as required. 2
Painting Category
A Class
B Class
Class
D Class
E Class
Note| |tt||Product usage environment
General usage environment
Coastal areas and corrosive environments
Oil environments
High temperature environments
Strongly corrosive environment
Applicable product and component range
General products installed in inland areas
Products
Installed in coastal areas containing salt spray Ports
ports, industrial atmospheres with certain corrosion
Mechanical products operating in areas such as
parts in contact with oil or oil-medium
quality boxes and containers etc.
Various parts and products that need to be protected by
paint in high-temperature environments
Machinery that is exposed to moisture for a long time and operates under humid, wet
hot conditions and components
(including the outer surface of underground pipes
machinery and components operating underwater
topcoat can be used as a primer in category 1D.
Primer for category 2E The paint thickness includes the thickness of the intermediate paint. Paint performance
See A1 in Appendix A
See A2 in Appendix A
See A3 in Appendix A
The thermal property is greater than or equal to
The maximum temperature of the operating environment
See A4 in Appendix A
See A5 in Appendix A
Table 2| |tt||Coating thickness range
Primer thickness
35~60
μm
50~100
μm
25 ~50
μm
25~50
μm
60~195
μm
125~250
μm
Total coating thickness
80~120
um
150~220
um
80~160
μm
50~85
μm
230~270
μm
250300
μm
Recommended coating varieties| |tt|| Primer: Co6-1 Iron Red Alcohol Primer, Co6-11 Iron Red Alkyd Primer, Cs-1 Red Dan Alkyd Antirust Paint, Ho6-2 Iron Red Epoxy Ester Primer; topcoat Paint: Ca42 various colors alkyd enamel, Co44 various colors alkyd enamel Primer: Hos-epoxy zinc-rich primer, Hos-iron red epoxy ester primer, Hs-red red epoxy ester anti-rust paint, cloud iron epoxy Anti-rust paint, G-zinc yellow, iron red perchlorethylene primer:
Topcoat: chlorinated rubber paint, epoxy resin enamel, various colors of acrylic enamel, Go4- various colors of perchlorethylene enamel, Go4- . Various colors of perchlorethylene exterior enamel primer: cloud iron epoxy anti-rust paint, Co6-iron red alkyd primer, Co6-11 iron red alkyd primer, Go64 iron red perchlorethylene primer, polyurethane paint resistant; Topcoat: Go4-6 perchlorethylene fuel tank paint, C4-1 alkyd paint-resistant, Qt nitro interior enamel, C54-31 various alkyd paint-resistant, epoxy paint-resistant, polyurethane paint-resistant
Inorganic Zinc silicate primer (400℃), W61-32 aluminum powder silicone heat-resistant paint (300350℃), W6142 various colors of silicone heat-resistant paint (300℃), W61-37 various colors of silicone heat-resistant paint (300~400℃) )
Primer: Ho64 epoxy zinc-rich primer, asphalt paint; Intermediate paint: Mica epoxy anti-rust paint, epoxy high-build paint: Top coat: chlorinated rubber aluminum powder anti-rust paint, thick Slurry type chlorinated rubber topcoat, epoxy asphalt thick build anti-rust paint
JB/T 5000.12-
1998
4.2.3
a)||tt ||b)
c)
d)
e)
f
g)
h)
i)
j)
4. 2. 4
JB/T5000.12—1998
Generally, product parts and components that are not painted: Parts (or components) in contact with or embedded in concrete and parts close to refractory materials; inner surfaces of fully enclosed box-shaped structural parts;
processed mating surfaces, working surfaces, friction surfaces, etc.: piping Internal surfaces of steel pipes, valves, flanges; stainless steel parts;
Wire ropes, anchor bolts and base plates;
Electroplated surfaces, non-ferrous metal parts;
Plastic and rubber product parts;| |tt||Rails, gaskets;
Motors and other external accessories.
Top coat color requirements
4.2. 4.1
4. 2. 4. 2
The top coat color of the machine product should meet the user's requirements. The color name and code of the paint It can be represented by the color name and code of GSBG51001, or by the color name and code in the paint factory color card and the color card (board) provided by the user. 3. If the user has no special requirements for the topcoat color of the machine product, the designer shall select it according to Table 3 and Table 4, and indicate it in the drawing and technical document.
4.2.4.4 The outer surface of the machine that is prone to collision during operation must be painted with yellow and black "tiger skin" stripes with a width of about 100mm and an inclination of 45° to the horizontal plane. If the surface area is small, the width of the stripes can be appropriately reduced, and the slope with the horizontal plane can be 75°, but each yellow stripe and black stripe shall not be less than 2
4.2.4.5 The color of the topcoat of the machine product piping shall be the same as The color of the machine's topcoat is the same; the color of the piping 1m away complies with the regulations of GB7231, see Table 5.
Table 3
Product category
Hot rolling equipment
Cold rolling equipment
Loading and unloading machinery
Continuous casting equipment
Metallurgical machinery, metallurgical dust removal equipment
Forging machinery, hoists
Mining equipment
Coke oven machinery, coal gasification equipment
Industrial and mining vehicles
Metallurgical vehicles
Crushing machinery
Ore dressing and sintering equipment
Artificial board equipment
Rubber equipment
Cement equipment
4
Light green (G02)
Light green (G02)
Orange (YR04)
Topcoat color
Lake green (BG02)
Lake green (BG02) ,
orange (R05)
spun green (GY02)
light gray (B03)
(B02)
light green||tt| |Orange red (R05)
Apple green (G01)
(GBG51001-94)
Apple green (G01)
Apple green (G01)
Medium green (G04)
Bean Green (GY01)
Medium Gray (B02)
, Brown (YR05)
Apple Green (G01)
, Silver White| |tt||Apple green
(G01)wwW.bzxz.Net
Apple green
(G01)
Light yellow (Y06)
Spun green
Black
(BG02)
Lake Green
Brilliant Green (GU3)
, Sky Blue (PB09)
Medium Green (G04)
Black , apple green (G01)
(GY02)
), orange (YR04)
medium gray (B02)
black
light gray (B03 )
Spinning green (GYm)
Lake green (BGM)
Lake green (BG02)
Light gray (B03)
Light sea blue (B11)| |tt||Orange (R0S)
, black
sea blue (B05)
bean green (GY01)
medium gray (B02)
JB/T 5000.12—1998
Table 4
Name of special parts of the product
Painted railings and handrails on the inner surface of the fuel tank, the casing and the parts inside
Control room Top grid and inner wall
Control room floor
Cover plate, walking platform plate, auxiliary plate, stair plate
Exposed fast-rotating parts, such as flywheel, pulley, coupling , large gears and other parts that require quick detection, such as the handle of the safety device, the switch brake control handle, the oil nozzle of the lubrication system, the scale of the limit position on the indicator surface 5
Pipeline Category
Hydraulic oil pipe
Thin oil return pipe
Dry oil pipe
Water pipe
High-pressure water pipe
Heating pipe
4.3
Coating construction requirements
4.3.1 Construction environment requirements
4.3. 1.1
4. 3. 1. 2
4. 3. 1. 3||tt ||4.3. 1.4
Top coat color
(according to GB7231-87)
Dark yellow (Y08)
Lime yellow (Y05)
Brown (YR05)
Light green (G02)
Big red (R0)
Silver gray (B04)
Pipeline category
Steam pipe|| tt | Y03) and other light colors
Yellow (Y06, Y07, Y08)
Semi-gloss paint
Iron red (R01)
Same color as the host, black||tt ||Big red (R03)
Big red (R03)
Topcoat color
(according to GB7231-87)
Aluminum color
Light phthalein Blue (PB06)
Light blue (PB06)
Medium (phthalein) blue (PB04)
Medium gray (B02)
Sewer and feces pipes|| tt||Black
Under normal circumstances, the ambient temperature during painting construction shall not be lower than 5℃, and the relative humidity shall not be greater than 85%. Outdoor construction is prohibited when it rains, snows, fogs or when the wind force exceeds Level 4. Do not apply if there is condensation on the surface of the object to be coated. During the coating and drying process, the paint film must not be exposed to the hot sun. The surface temperature of the parts to be coated shall not exceed 60°C. The construction area must be well ventilated. During the painting and drying process of the paint film, dust and other foreign matter should be prohibited from flying. 4.3.2 Construction requirements
4.3.2.1 When painting, the relevant regulations on temperature, humidity, recoating interval, preparation method, etc. of various coatings must be strictly followed. 4.3.2.2
4.3.2.3
4.3.2.4
4.3. 2.5
During construction, if the coating appears to deteriorate such as gelling or agglomeration, use should be stopped immediately . The paint film must be even and there must be no leakage. Corners, seams, screw heads, and riveted welds must be painted first, and then large areas can be painted. Parts or parts that cannot be painted after welding and assembly can be painted before and after welding. Paint before assembly. At the junction of two coatings of different colors, the boundaries must be clearly visible and neat. 4.3.2.6
The paint contact surfaces at the joints of two frequently disassembled parts must be smooth, with obvious seams, and must not collapse, have blurred boundaries, or be painted into one piece
The last part of the equipment The top coat should be applied after passing the final assembly test run. 4.3. 2. 7
4.3.2.8 The damaged paint film should be repaired, and the repaired surface should be surface treated. The overlap width with the surrounding coating should not be less than 50mm (or if the damaged area is small, the repaired area should be more than 1 times larger than the damaged area), repairs should be carried out according to the prescribed levels, and the color and coating thickness of the repaired parts should be consistent with the thickness of the surrounding coatings. 5
JB/T5000.12—1998
4.3.2.9 Before spraying, cover the unpainted parts of the product to prevent paint mist contamination. 4.3.2.10 Whether the surface of the machine product is coated with putty should be indicated in the drawings and technical documents. When applying scraper putty, primer must be applied first and applied after the primer has dried. Applying putty is generally done 1 to 2 times, and the putty layer thickness is 0.5 to 1mm each time. The local maximum thickness shall not exceed 5mm. After drying, the putty surface must be polished. The polished putty surface should be smooth, firm, and free of cracks. 4.3.3 Safety matters before painting shall be carried out in accordance with the relevant provisions of GB7692 and GB7693. Safety matters during painting construction shall be carried out in accordance with the relevant provisions of GB6514.
5 Inspection items and methods
5.1 The quality of surface rust removal shall be inspected according to the color photos of GB8923, or according to the method specified in Appendix C (Appendix of the prompt).
Inspect the quality indicators of the coating according to the provisions in Appendix A. 5.2
5.3 During construction, a wet film thickness gauge is often used to measure the paint film thickness in order to more accurately control the dry film thickness. 5.4 To check the dryness of the paint film, press the paint film with your thumb. If no dent is left on the film when pressed by your thumb, it means that the paint film has actually dried.
5.5 Appearance inspection: The primer and intermediate paint coatings are not allowed to have defects such as pinholes, bubbles, cracks, falling off, bottom bite, color bleeding, no bottom covering, sagging, and missing paint. The topcoat should be smooth, even and consistent in color, and defects such as sags and bubbles are not allowed on the main surfaces. The inspection method can be observed with the naked eye or a five-fold magnifying glass.
5.6 Inspection of coating thickness should be measured after each coating is dried, and the total thickness should be measured after all coatings are painted. The inspection method is: use an electromagnetic film thickness meter to measure, every 10m2 (the coating area is less than 10m2 is counted as 10m2) as one place, every 3 to 4m long slender body such as pipelines is as one place, and measure 3 to 5 points at each place. . The average thickness of each point measured at each location shall not be less than 90% and not higher than 120% of the total thickness of the specified coating. The minimum value of the thickness at each point shall not be less than 70% of the total thickness of the specified coating. 5.7 Coating adhesion performance inspection
6 test panels with a specification of 200mm×200mm. After surface treatment, apply one layer in the same manner as the product. The adhesion inspection is performed after the paint film has dried. Each layer is applied. Check once). Use the cross-drawing method to inspect: use a sharp blade or safety blade to draw a cross with an included angle of 60° on the surface of the test plate, and the knife mark should reach the steel plate. Then apply a special pressure-sensitive tape (width 25mm) to make the tape stick to the paint film, and then quickly pull up the tape with your hands. If the total width of the coating on both sides of the knife mark does not exceed 2mm, it is qualified. 6 Painting marking requirements
In the machine product design master drawing-5 technical document, the product painting category, topcoat color and coating thickness should be indicated. 6.1 Machine product coating category
a) Mark the usage environment of the complete machine according to the coating category in Table 2, such as: "This product is painted in Category A"; b) There are differences in machine products The components and parts of the complete machine coating category should also be marked. The method is basically the same as 6.1a), but the drawing number, name and location of the component must be indicated before the coating category. 6.2 The topcoat color of the machine product
The topcoat color of the coating should be marked with the color name and code according to GSBG51001 or GB3181-82), such as "the surface color of this product is apple green G01". It can also be marked according to the paint factory color card and the color card (plate) provided by the user, but the source and number of the color card must be indicated. Components and parts that are different from the topcoat color of the whole machine should also be marked. Method Basically the same as before, but the drawing number, name and location of the component must be indicated. For products with many types of paint colors (which are difficult to describe clearly, a diagram can be drawn for explanation if necessary. 6.3 Machine product coating thickness ||tt ||Indicate the coating thickness according to Table 2 and the different coatings selected 6
JB/T 5000.12—1998
Appendix A
(Appendix to the standard)
General technical requirements for paints used in various coating categories 1 Technical requirements for coatings for Class A products
A1| |tt||Al1
Primer requirements are shown in Table A1.
Table A1
Item
Paint film color and appearance
Viscosity (coating 4 viscometer) s
Fineness um
Hardness
Flexibility mm
Impact strength g·cm
Adhesion level
Salt water resistance (25℃±1℃)
Soak 48h|| tt||Adaptability to topcoat
Drying time
Topcoat requirements are shown in Table A2.
A12
item
Paint film color and appearance
mesh
viscosity (Tu-4 viscometer) s
fineness um
Gloss %
Flexibility mm
Impact strength lg·cm
Adhesion level
Water resistance 6h
Gasoline resistance ( Immersed in GB1922-80 NY-1206h
solvent oil)
drying time
index
The color depends on the pigment used in the paint, and the paint film is smooth ≥40| |tt||≤60
2B
2
50
1
No blistering, no rust
No adverse phenomena
Comply with product instructions
Table A2
Indicators
Comply with the standard sample and its color difference range, flat and smooth 60~90
40||tt| | 90 | tt||No blistering, no wrinkles,
Allow gloss recovery within 1 hour
Comply with product instructions
Test method
According to relevant regulations||tt ||Test method
According to relevant regulations
7
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