Technical condition of paint coating and antirust for cement machinery
Some standard content:
ICS91-110
Registration number: 18409-2006
Building materials industry standard of the People's Republic of China
JC/T402-2006
Replaces JC/T402-1991 (1996)
Technical condition of paint coating and antirust for cement machinery
Technical condition of paint coating and antirust for cement machineryIssued on August 19, 2006
Implementation on December 1, 2006
Issued by the National Development and Reform Commission of the People's Republic of ChinaForeword
This standard is a revision of JC/T402-1991 (1996) "Technical condition of paint coating and antirust for cement machinery". Compared with JC/T402-1991 (1996), the main technical changes of this standard are as follows: JC/T402--2006
Added the requirements for surface pretreatment before painting, including rust removal methods, rust removal levels and the interval time between painting after rust removal; specified the specific requirements for coating according to the use environment; divided the test methods and inspection rules into two chapters to make the standard more operational; the inspection rules divided the inspection items into factory inspection and type inspection. This standard does not specify the rust prevention of packaging during transportation. The packaging during transportation should comply with the provisions of JC/T406 "Technical Conditions for Packaging of Cement Machinery".
This standard replaces JC/T402-1991 (1996) "Technical Conditions for Painting and Rust Prevention of Cement Machinery" from the date of implementation. Please note that some contents of this standard may involve patents. The issuing agency of this standard shall not bear the responsibility for identifying these patents. This standard is proposed by the China Building Materials Industry Association. This standard is under the jurisdiction of the National Building Materials Industry Machinery Standardization Technical Committee. The responsible drafting unit of this standard is Tianjin Cement Industry Design Institute Zhongtian Shiming Technology Group Co., Ltd. The participating drafting units of this standard are Shanghai Jianshe Road and Bridge Machinery Equipment Co., Ltd., Chengde Lianchuang Control Equipment Co., Ltd., and China Building Materials Equipment Co., Ltd.
The main drafters of this standard are Li Shunyin, Wang Dinghua, Lv Ming, and Jin Shuang. The previous versions of the standards replaced by this standard are: JC/T402-1991 (1996):
—JC/T402-1991.
1 Scope
Technical conditions for painting and rust prevention of cement machinery
This standard specifies the technical requirements, test methods and inspection rules for painting and rust prevention of cement machinery. This standard is applicable to the painting and rust prevention of cement machinery, and can be used as a reference for the painting and rust prevention of other building materials machinery. 2 Normative references
JC/T402—2006
The clauses in the following documents become the clauses of this standard through reference in this standard. For all referenced documents with dates, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all referenced documents without dates, the latest versions are applicable to this standard. GB/T1720 Determination of paint film adhesion
GB/T1730
Determination of paint film hardness (negIS01522)GB/T1731
Determination of paint film flexibility
GB/T1732
2 Determination of paint film impact resistance
GB/T1743
Determination of paint film gloss
GB/T1764
Determination of paint film thickness
GB/T4879|| tt||Rust-proof packaging
GB/T7231
Basic identification colors and identification symbols for industrial pipelines 3 Rust grade and rust removal grade of steel surfaces before painting (modIS08501-1:1998) GB/T8923
1 Paint film color standard sample cardwww.bzxz.net
GSBG51001
SSPCSP.1~SP.10SSPC Steel structure surface pretreatment specification 3 Terms and definitions
The following terms and definitions apply to this standard. 3.1
Paint
A solution of an organic polymer colloid mixture that can form a film when applied to the surface of an object. 3.2
Painting
The construction process of applying paint to the surface of an object. 3.3
Dilution
Liquid used to dissolve and dilute paint to meet application requirements. 3.4
Base paint
Base paint applied directly to the surface of an object. 3.5
Antirust paint
Made from antirust pigments and appropriate paints, used to prevent atmospheric oxygen and moisture from corroding the surface of a workpiece. 1
JC/T402—2006
Surface paint
Paint applied to the outermost surface of an object. 3.7
Sag
The phenomenon of painting on a vertical surface without flowing down the previous coating and leaving marks after drying. 3.8
Pinhole
A concave, transparent, pinhole-like pore on the surface of a paint film during its drying process. 3.9
Orange skin orange skin
Due to the poor leveling of the paint film, the surface of the paint film after drying forms an uneven phenomenon similar to orange skin. 4 Technical requirements
4.1 Basic requirements
4.1.1 The surface of the product that has been painted or treated with rust prevention shall not be corroded within 1 year from the date of leaving the factory under normal storage and transportation conditions.
4.1.2 The paint and rust prevention of the product shall generally be implemented in accordance with this standard. The product drawing technical documents and the user's special requirements shall be implemented in accordance with the product drawing technical documents and the user's special requirements. 4.2 Paint and rust prevention materials
4.2.1 The selection of primer, putty, intermediate paint, topcoat and thinner used shall be reasonably matched and shall not be mixed. 4.2.2 The quality of various paints shall comply with the provisions of relevant standards and shall have a product (paint) certificate of conformity. If the label is unclear or the packaging is damaged, it shall be re-inspected according to the standard and only qualified ones can be used. Expired paints must not be used. 4.2.3 Cleaning and anti-rust materials must have a product factory certificate before they can be used. New anti-rust materials must pass product identification before they can be used.
4.3 Painted and anti-rusted parts
4.3.1 Product processed parts, blued parts, fasteners, accessories and tools must be rust-proof. Except for the following product parts and components, all others should be painted: 4.3.2
Parts (or components) in contact with concrete or embedded in concrete and parts close to refractory materials: Inner surface of fully enclosed box-shaped structure!
Processed mating surfaces, working surfaces, friction surfaces, etc.; inner surfaces of steel pipes, valves, and flanges:
Stainless steel parts, high-temperature working parts, and easily worn parts: wire ropes, anchor bolts and their base plates:
Electroplated surfaces, non-ferrous metal parts:
Non-metal parts such as plastics and rubber:
Parts that affect performance after painting, such as internal components of electrostatic precipitators; i)
Parts or parts that are not allowed to be painted according to other technical requirements. 4.4 Surface pretreatment before painting
4.4.1 Before painting, all surfaces of steel parts that need to be painted should be cleaned of burrs, flash, sand adhesion, gates, risers, oil stains, flaky flaky oxides, rust, dust, dirt, etc. on the surface, and the welds on the surface should be polished flat. 4.4.2 The rust removal method and rust removal grade of steel parts shall comply with the provisions of GB/T8923, see Table 1. The scope of application of the rust removal method and rust removal grade of steel parts shall comply with the provisions of Table 1.
JC/T402-—2006
4.4.3 On the surface of equipment with large vibration or alternating stress, such as crushers, mills, zipper machines, screw conveyors, unloading air lock devices, etc., the rust removal grade should reach Sa2 or St2 or above. 4.4.4 If heat treatment is required after the welded structural parts are formed, the rust removal process should be carried out after the heat treatment process. 4.4.5 The projectiles used for blasting (blasting) rust removal can be quartz sand, cast iron (steel) pellets, wire cut shot, etc. The projectiles used should have edges and corners. The diameter of the quartz sand used in sandblasting shall not exceed 3mm; when using shot blasting, the diameter of the projectile used for rust removal on the surface of castings and forgings shall not exceed 2mm, and the diameter of the projectile used for rust removal on the surface of steel plates and steel sections shall be 0.6mm~1.2mm. 4.4.6 The interval between spraying (blasting) rust removal or manual power rust removal and primer application shall not be greater than 6 hours (the interval shall not be greater than 4 hours in areas where the relative humidity of the air is greater than 70%). The interval between phosphating treatment immediately after pickling and primer application shall not be less than 48 hours (the interval shall not be less than 72 hours in an environment with a temperature below 0°C). There shall be no rust or pollution on the surface before painting. Table 1 Rust removal methods, grades and recommended application scope Rust removal methods
Spraying or blasting
Manual and power
Rust removal grade
GB/T8923
Sa21/2
SP,2T and
Recommended application scope
Auxiliary parts or auxiliary equipment and surfaces of steel parts used in mildly corrosive environments. The surfaces of steel parts in major components or major equipment and in highly corrosive environments, and steel parts that are exposed to high temperatures in long-term operations in damp, humid, warm, salt spray and other environments and need to be painted with heat-resistant paint. Surfaces in contact with liquid media or corrosive media, such as the inner surface of oil tanks, reducer housings, and water tanks. All steel parts that are in contact with high temperatures and do not need to be painted with heat-resistant paint. Due to equipment limitations, large steel components and steel components with special shapes cannot be sprayed or blasted for rust removal, such as rotary kiln cylinders.
All kinds of steel pipes on equipment: thin plates (wall thickness less than 5mm) that cannot be sprayed or blasted: medium and small parts and small parts with complex structures, etc.
aSSPC is the surface rust removal quality level of the American Steel Structure Coating Committee's "SSPC Steel Structure Surface Pretreatment Specification". 4.4.7 Steel plates and profiles used to make large structural parts should be rust-free in advance, and the rust removal level is generally Sa2, and primer should be applied within the specified time. However, the reserved welding position shall not be painted for the time being. If the reserved time is long, a weldable primer shall be applied. 4.4.8 For plates or profiles with a wall thickness of ≤6mm, manual rust removal or sandblasting shall be used for rust removal. 4.4.9 The parts that need to be puttyed shall be surface treated before puttying, and the surface shall be flat after puttying. 4.5 Coating requirements
4.5.1 The classification of paint, product use environment, applicable product and component range and recommended coating thickness are shown in Table 2. 4.5.2 Technical requirements for coating of some special parts and components in the product: a) The surfaces where riveted parts contact each other should be coated with anti-rust paint with a thickness of 30μm to 40μm before connection, and the overlapping edges should be sealed with paint, putty or adhesive;
The primer damaged by processing or welding should be repainted; b)
The inner surface of the unclosed box structure, the inner surface of the safety cover, the inner surface that is scattered during transportation, etc., should be coated with anti-rust paint with a thickness of 30um to 80μm.
JC/T402—2006
Table 2 Coating classification, use environment, applicable products and parts range and coating thickness Coating thickness range/m
Product use environment
General environment
Coastal areas and corrosive
Strong environment
Oil environment
High temperature environment
Strong corrosive environment
Applicable products and parts range
Cement machinery products installed in inland areas Cement machinery products installed in coastal ports with salt spray, and operating in areas with certain corrosive industrial atmosphere.
Parts in contact with oil or oil medium boxes and containers, etc. Various parts and products protected by paint in high temperature environments, such as rotary cylinders, etc.
Machinery and parts (including the outer surface of underground pipelines) that are exposed to moisture for a long time and operate under humid and hot and humid conditions.
Note 1: In Class D, topcoat can be used as primer. Note 2: The thickness of primer in Class E includes the thickness of intermediate paint. Primer thickness
60~150
Total coating thickness
80~120
150~220
80~160
180~250
4.6 Topcoat color
4.6.1 The color name and code of the paint can be expressed according to the color name and code in GSBG51001, and it is also allowed to be expressed according to the color name and code in the color card (plate) provided by the user.
4.6.2 The topcoat color of the main part of the cement machinery shall comply with the provisions of Table 3. Table 3 Main body topcoat color
Machine name
Grinding, packaging and conveying equipment
Glowing, cooling and dust removal equipment
Mining and pre-homogenizing machinery
Other cement machinery
Main body color
Sea gray
Silver gray
Orange
Sea gray
GSBG51001 color card number
59YR04
4.6.3 The topcoat color of the main parts of cement machinery shall comply with the provisions of Table 4. When applying stripes, if the surface area is small, the stripe width can be appropriately reduced and the slope with the horizontal plane can be 75. There shall be no less than 2 yellow stripes and 2 black stripes each. 4.6.4 The topcoat color of the machine piping shall be the same as that of the machine body: the color of the piping more than 1m away from the main body shall comply with the provisions of GB/T7231, as shown in Table 5.
Parts name
Table 4 Topcoat colors of main parts
Chassis of mobile machinery, base frame of fixed machineryExposed spokes and spokes of fast-rotating parts
Inner surface of oil tank reducer housing and non-machined surface of parts immersed in oilSurface of parts immersed in water or slurry
External surfaces that are prone to collision during work
Railings and handrails
Bright red
Brown
100mm wide, yellow and black stripes at 45°
Dark yellow
GSBG51001 color card No.
50Y08 dark yellow black
Quality requirements of paint film
Pipeline name
Fuel oil supply pipeline
Fuel oil return pipeline
Lubricating oil supply pipeline
Lubricating oil return pipeline
Hydraulic transmission oil pipeline
Clean water pipeline
Return water pipeline
Mud pipeline
Slurry pipeline
Compressed air pipeline
Powdered coal transportation pipeline
Cable and wire pipeline
Quality requirements of primer shall be as specified in Table 6.
Quality requirements of topcoat shall be as specified in Table 7.
Project name
Appearance quality
Piping topcoat color
Topcoat color
Light brown
Light yellow
Dark yellow
Medium yellow
Light green
Dark green
Iron yellow
Iron red
Medium iron blue
Sea gray
Table 6 Primer quality requirements
a) Main plane
Adhesion
Project name
Film color
Film appearance
Adhesion
Film hardness
Film flexibility
Film kitchen impact||tt ||Film gloss
Film thickness
b) Secondary plane
c) Inner surface
Film thickness
Quality requirements for topcoat
JC/T402-2006
GSBG51001 color card number
54YR01
57YR05
Technical requirements
Smooth, without foreign matter, sagging and missing paintAccording to Grade 1 specified in GB/T1720
According to Grade 2 specified in GB/T1720
According to Grade 3 specified in GB/T1720
According to the provisions of Table 2
Technical requirements
According to the provisions of Tables 3 to 5.
a) The paint film should be smooth and uniform in color;
b) There should be no defects such as foreign matter, oil stains, sagging, wrinkles, orange peels, brush marks, pinholes, bubbles, cracks, peeling, and missing paint; c) The interface between different color paints should be clear and should not contaminate each other. a) Main surface: According to Grade 1 specified in GB/T1720: b) Secondary surface: According to Grade 2 specified in GB/T1720; c) Internal surface: According to Grade 3 specified in GB/T1720. According to GB/T1730, ≥0.25,
a) Main surface: According to R≤1mm specified in GB/T1731: b) Secondary surface and internal surface: According to R≤1.5mm specified in GB/T1731, according to GB/T1732, ≥490N·cm, the main plane that affects the appearance shall be in accordance with GB/T1743, and the gloss ≥70% shall be in accordance with CB/T1764 and Table 2 of this standard.
JCT402—2006
4.8 Rust prevention requirements
4.8.1 Rust prevention packaging shall comply with GB/T4879 and the quality shall not be lower than Grade 3.4.8.2 Before rust prevention, the anti-rust parts should be cleaned and free of rust, water marks, oil marks and other foreign matter. The original processed surface should not be damaged. 4.8.3 Anti-rust operation should be carried out in a clean environment. Anti-rust should be carried out immediately after cleaning and drying. If interrupted, temporary anti-rust measures should be taken.
4.8.4 The anti-rust agent layer on the anti-rust surface of the product should be uniform and continuous, without bubbles and foreign matter. 5 Test method
The test methods for the main technical requirements such as rust removal grade and paint film color shall be in accordance with the provisions of Table 8. The test methods for key anti-rust parts shall be in accordance with the provisions of GB/T4879.
Table 8 Main technical requirements Test methods
Item name
Rust removal level
Paint film color
Paint film appearance quality
Paint film adhesion
Paint film hardness
Paint film flexibility
Paint film impact resistance
Paint film gloss
Paint film thickness
6 Inspection rules
6.1 Inspection classification
Test method
a) Visually inspect according to the photos specified in GB/T8923: b) Visually inspect.
a) Visually inspect according to the paint film color standard color card specified in GSBG51001: b) Or visually inspect with the paint film color sample card provided by the user. Visually inspect.
Test according to the paint film adhesion test method of GB/T1720. Test according to the paint film hardness test method of GB/T1730. Test according to the paint film flexibility test method of GB/T1731. Test according to the paint film impact resistance test method of GB/T1732. Test according to the paint film gloss test method of GB/T1743. Test according to the paint film thickness test method of GB/T1764. The inspection is divided into factory inspection and type inspection. 6.2 Factory inspection
6.2.1 The paint quality of each product must be inspected by the quality inspection department according to the factory inspection items, and it can only be shipped after passing the inspection. 6.2.2 The following items are factory inspection items: 4.4.1, 4.4.2, 4.6.2, 4.6.3, 4.6.4, 4.7.1 No. 1 in Table 6, 4.7.2 No. 1 and No. 2 in Table 7, 4.8.4.
6.3 Type inspection
6.3.1 Type inspection should be carried out in the following cases: a) The paint peels off and serious corrosion occurs during the warranty period; b) When the statutory quality supervision agency proposes type inspection. 6.3.2 Type inspection items shall be inspected in accordance with all items specified in this standard. 6.3.3 Type inspection shall be carried out by sampling one (or one piece) from qualified incoming products for inspection, or by using samples. If the inspection fails, double sampling shall be carried out for re-inspection. If the re-inspection passes, the batch of products shall be judged as qualified. If there is still one (or one piece) or sample that fails, the batch of products shall be judged as unqualified. 6
People's Republic of China
Building materials industry standard
Technical conditions for anti-rust coating of cement machinery
JC/T402—2006
Published by China Building Materials Industry Press
Issued by Beijing Publishing House of Xinhua Bookstore Distributed by Xinhua Bookstores in various places Printed by China Academy of Geological and Mineral Resources Printing
All rights reserved. No reproduction allowed
6 sheets 0.75 Words 18,000 words
Format 880×1230
First edition in December 2006 First printing in December 2006 Book number: 1580227.040
Serial number: 0388
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