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NB/T 10287-2019: (FRP cable tray)
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Basic data | Standard ID | NB/T 10287-2019 (NB/T10287-2019) | | Description (Translated English) | (FRP cable tray) | | Sector / Industry | Energy Industry Standard (Recommended) | | Classification of Chinese Standard | K65 | | Classification of International Standard | 29.120.10 | | Word Count Estimation | 17,176 | | Date of Issue | 2019-11-04 | | Date of Implementation | 2020-05-01 | | Issuing agency(ies) | National Energy Administration | NB/T 10287-2019: (FRP cable tray)---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Glass-reinforced plywood cable tray
ICS 29.120.10
K 65
NB
Energy Industry Standards of the People's Republic of China
FRP cable tray
2019-11-04 released
2020-05-01 implementation
Issued by National Energy Administration
Table of contents
Foreword...II
1 Scope...1
2 Normative references...1
3 Terms, definitions and classification...1
4 Technical requirements...3
5 Test method...6
6 Inspection rules...9
7 Marking, transportation and storage...10
References...14
Figure 1 Layout of test pieces for impact test...12
Figure 2 Layout of load test for straight section...12
Figure 3 Arrangement for partial load test of straight-line joints...13
Figure 4 Test Arrangement for Typical Bend...13
Table 1 Type code of cable tray forming process...2
Table 2 Structure code...2
Table 3 Code of main varieties...3
Table 4 Main performance codes...3
Table 5 Minimum allowable thickness of FRP cable tray...4
Table 6 The minimum allowable plate thickness of the lining steel frame...4
Table 7 Oxygen Index Flame Retardant Grade of FRP Bridge...5
Table 8 Technical requirements for chemical resistance performance of FRP bridge frame...5
Table 9 Typical cable tray safe working load (SWL) table...6
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by China Electrical Equipment Industry Association.
This standard is under the jurisdiction of the National Electrical Accessories Standardization Technical Committee (SAC/TC 67).
Drafting organizations of this standard. China National Electrical Equipment Research Institute Co., Ltd., Jiangsu Haiwei Group Co., Ltd., Hebei Fuente Electric
Equipment Co., Ltd., Zhongshan Hengyiying Industrial Co., Ltd., Shandong Hengda Co., Ltd., Shenzhen Huayitong Industrial Electric Co., Ltd.,
Weikai Testing Technology Co., Ltd.
The main drafters of this standard. Cai Jun, Zhang Yuejin, Xu Lin, Li Dajian, Liang Fengkai, Luo Yangjun, Li Xiqin.
FRP cable tray
1 Scope
This standard specifies the classification, technical requirements, test methods, inspection rules, signs, transportation and storage of FRP cable trays.
This standard is applicable to cable trays made of glass fiber reinforced plastic (glass fiber reinforced plastic) formed by hand lay-up, molding, pultrusion, and compounding.
(Hereinafter referred to as "bridge").
Note. This bridge can be used for cable laying in corrosive places.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document.
For undated references, the latest version (including all amendments) applies to this document.
GB/T 1446-2005 General rules of fiber reinforced plastics performance test methods
GB/T 1447-2005 Test method for tensile properties of fiber reinforced plastics
GB/T 1449-2005 Test method for bending properties of glass fiber reinforced plastics
GB/T 1804-2000 General Tolerance Tolerance of linear and angular dimensions without tolerance
GB/T 2423.55-2006 Environmental testing of electrical and electronic products Part 2.Environmental testing Eh. Hammer test
GB/T 2573-2008 Test method for aging performance of glass fiber reinforced plastics
GB/T 3274 Carbon structural steel and low-alloy structural steel hot-rolled steel plate and steel strip
GB/T 3857 Test method for chemical resistance of glass fiber reinforced thermosetting plastics
GB/T 8237 Liquid unsaturated polyester resin for fiber reinforced plastics
GB/T 8924 Test method for burning performance of fiber reinforced plastics Oxygen index method
GB/T 11253 Carbon structural steel cold-rolled sheet and steel strip
GB/T 13657 Bisphenol A epoxy resin
GB/T 16422.2 Plastic laboratory light source exposure test method Part 2.Xenon arc lamp (GB/T 16422.2-2014, ISO
4892-2.2006, IDT)
GB/T 17470 Glass fiber chopped strand mat and continuous strand mat
GB/T 18369 Glass fiber roving
GB/T 18370 Glass fiber roving cloth
GB/T 18371 Continuous glass fiber yarn
GB/T 21762 cable management cable tray system and cable ladder system (GB/T 21762-2008, IEC 61537.2006, IDT)
3 Terms, definitions and classification
3.1 Terms and definitions
The following terms and definitions apply to this document.
3.1.1
Cable tray
The full name of a rigid structure system that supports cables is composed of straight sections, bends, accessories, and hangers of cable trays or cable ladders.
Note. referred to as bridge.
3.1.2
Glass-reinforced plywood cable tray
Cable tray made of glass fiber reinforced plastic.
3.2 Classification
3.2.1 Product Classification
3.2.1.1 Bridges are divided into hand-laid glass fiber reinforced plastic bridges according to different molding processes; molded glass fiber reinforced plastic bridges; pultruded glass fiber reinforced plastic bridges
Frame; composite molding fiberglass bridge frame.
3.2.1.2 The bridge frame is divided into non-perforated tray (usually called trough type) (C), perforated tray (P), ladder type (T) and
Four types of large span type (D).
3.2.1.3 Bridges are divided into four types. common type (P), flame-retardant type (Z), shielding type (B), and composite type (FB) according to their performance.
3.2.2 Model
4 Technical requirements
4.1 General requirements
4.1.1 Main raw materials
4.1.1.1 Unsaturated polyester resin should meet the requirements of GB/T 8237, and epoxy resin should meet the requirements of GB/T 13657.
4.1.1.2 Glass fiber roving should meet the requirements of GB/T 18369, and the non-twisted roving should meet the requirements of GB/T 18370.
The fiber mat should meet the requirements of GB/T 17470, and the continuous glass fiber yarn should meet the requirements of GB/T 18371.
4.1.1.3 Do not use glass fiber products woven by textile equipment, glass fiber products produced by glass fiber drawing products from clay crucibles, and high-alkali glass
Fiber products are used as raw materials for production.
4.1.1.4 The steel plate lining of the composite cable tray shall meet the requirements of GB/T 3274 and GB/T 11253, and the thickness shall meet the requirements of this standard.
Regulations. The steel frame of the bridge frame should be degreasing, rust removed, surface galvanized or made of galvanized steel.
4.1.2 Appearance
4.1.2.1 The surface of the product is flat and smooth, with uniform color, and there must be no wrinkles, cracks, particles, glue, resin peeling, fiber exposure, and appearance.
Defects such as sticky surface.
4.1.2.2 The glue content is uniform, the curing is stable, and there is no delamination. The accumulation area of bubbles on the surface of a single product shall not be greater than 100 mm2.
The bubble area must not be larger than 15 mm2.
4.1.3 Thickness
4.1.3.1 The minimum allowable thickness of the glass fiber reinforced plastic cable tray shall meet the requirements of Table 5.
Note 1.The thickness of the connecting plate should be selected at least according to the thickness of the pallet and the side plate of the ladder frame, or one grade of thickness can be selected.
Note 2.The thickness of the cover can be selected one level lower according to the thickness of the pallet and ladder frame. FRP cable tray with width W≥400, the bottom thickness is allowed to be lower than the support
The thickness of the side plates of the tray and the ladder frame, but the crosspiece must be added, and the center distance of the crosspiece should not be greater than 400 mm.
Note 3.The special structural form of the bridge is used, and the thickness of each part is allowed to be lower than this table, but the safety load (SWL) should meet 4.3.1.
4.1.3.2 See Table 6 for the minimum allowable thickness of the steel frame lining the composite cable tray.
4.1.4 Manufacturing accuracy
4.1.4.1 The allowable deviation of the straight length of the cable tray shall meet the following requirements.
a) When the length is ≤2 000 mm, the allowable deviation is ±2.0 mm;
b) When the length is more than 2 000 mm, the allowable deviation is ±4.0 mm.
4.1.4.2 The limit deviations of other dimensions shall comply with the requirements of Class V in GB/T 1804-2000.
Note. The width of the cover is taken as a positive deviation, and the width of the tank is taken as a negative deviation.
4.1.4.3 The allowable deviation of the flatness of the cable tray shall not exceed 5.0 mm per square meter.
Note. The cable tray width less than 1,000 mm is calculated as 1,000 mm.
4.2 Physical and chemical properties
4.2.1 Overview
The physical and chemical properties of the glass fiber reinforced plastic bridge frame should meet the provisions of 4.2.2 ~ 4.2.8, and special requirements are negotiated between the supplier and the buyer.
4.2.2 Flame retardant properties
The oxygen index of the glass fiber reinforced plastic bridge should be in accordance with the flame retardant grade of Table 7 according to the use environment.
Note. The requirements for the use environment are negotiated between the factory and the customer.
4.2.3 Tensile bending performance
4.2.3.1 The tensile strength of FRP bridge frame shall be ≥150 MPa.
4.2.3.2 The bending strength of FRP bridge frame shall be ≥100 MPa.
4.2.4 Water resistance
After the specified time test, the surface of the product should not show signs of softening, wrinkles, blistering, cracking, dissolution, solvent immersion, etc. The material
The retention rate of flexural strength performance is not less than 85% before the test.
4.2.5 Resistance to chemical media
The chemical resistance performance of the FRP bridge should meet the requirements of Table 8.
4.2.6 Environmental adaptability
4.2.6.1 Humidity and heat resistance
After 240 h of heat and humidity resistance test, the product should have no traces of discoloration or erosion, and the retention rate of the material's bending strength performance should not be less than the test
80% before.
4.2.6.2 Low temperature drop resistance
After the low-temperature drop test, the product should not be broken, cracked, or damaged.
4.2.6.3 High temperature resistance
The glass fiber reinforced plastic bridge has no abnormal changes under the high temperature of (70±5)℃.
4.2.6.4 Artificial accelerated aging test (xenon arc light source)
After the artificial accelerated aging test of the xenon lamp with the total irradiation energy not less than 3.5×106 kJ/m2, the sample has no obvious discoloration, cracking, chalking, etc.
Aging phenomenon, the retention rate of material bending strength performance is not less than 80% before the test.
4.2.7 Impact resistance
The bridge should be able to withstand the impact of the collision energy of 10 J in Table 2 of GB/T 2423.55-2006, and there should be no impact on safe use after the collision.
Deformation and cracks.
4.2.8 Electromagnetic shielding
The requirements for electromagnetic shielding cable trays shall be determined through negotiation between the supplier and the buyer.
4.3 Mechanical strength
4.3.1 Normal mechanical load
The cable tray shall provide sufficient mechanical strength in addition to its own weight, and shall also include the mechanical load of the wire and cable that it can bear.
Lotus. The safety of product use is the main basis for judging the safe working load (SWL).
In order to ensure the safety of the product, the following requirements shall be met.
a) The required mechanical strength can be obtained by selecting the thickness and shape of the material, or by the fixed bracket distance specified by the manufacturer;
b) When the cable tray bears the safe working load (SWL), its relative deflection should not be greater than 1/200 (see Table 9);
Note. The manufacturer or its agent can provide the safe working load (SWL) in a load curve, table or similar form;
c) Various types of supports and hangers should be able to withstand the safe working load (SWL) of pallets and ladder frames of corresponding specifications (number of layers), and meet the requirements of strength,
Requirements for stiffness and stability.
4.3.2 Special mechanical loads
In principle, the cable tray system cannot be used as a pedestrian passage except for the normal mechanical load. If it needs to be used as a pedestrian passage and other purposes,
Special designs for this purpose should be negotiated between the manufacturer and the user.
5 Test method
The cable tray can be tested only 168 hours after the finished product. The test sample preparation and the number of samples shall be in accordance with 4.1 in GB/T 1446-2005
Regulations.
5.1 Appearance and manufacturing accuracy inspection
5.1.1 The appearance of the cable tray shall be inspected by a combination of visual inspection and hand touch inspection. The inspection results shall meet the requirements in 4.1.2.
Related regulations.
5.1.2 The dimensional accuracy of the cable tray shall be inspected with vernier calipers and tape measures, and the inspection results shall meet the requirements of 4.1.3 and 4.1.4.
5.2 Physical and chemical performance test
5.2.1 Flame retardant performance test
The oxygen index is implemented according to GB/T 8924.
5.2.2 Tensile and bending strength test
5.2.2.1 Tensile strength test
According to GB/T 1447 regulations.
5.2.2.2 Flexural strength test
According to GB/T 1449 regulations.
5.2.3 Water resistance test
General routine tests and type inspections can be carried out according to the method specified in 4.4 of GB/T 2573-2008.The test water should be distilled water or deionized water.
The test water temperature is (80±2)℃. After the test for 144 hours, the appearance quality and bending strength performance retention rate of the sample are measured.
When there is a dispute, it can be carried out according to the method specified in 4.3 of GB/T 2573-2008.The test water should be distilled or deionized water.
The water temperature is (23±2)℃. After 720 hours of test, the appearance quality and bending strength retention rate of the sample are measured.
5.2.4 Chemical resistance performance test
5.2.4.1 Gasoline resistance performance test
Carry out according to the method specified in GB/T 3857, test solvent is 90# gasoline, soak at room temperature (10～35) ℃ for 360 h or heat up (80±2) ℃
After 72 hours of immersion, the appearance quality and the retention of bending strength properties of the sample were measured.
5.2.4.2 Acid resistance test
Carry out according to the method specified in GB/T 3857, the test solvent is 30% sulfuric acid solution, soak at room temperature (10～35) ℃ for 360 h or heat up (80
±2) After immersing in ℃ for 72 hours, determine the appearance quality and bending strength retention rate of the sample.
5.2.4.3 Alkali resistance test
Carry out according to the method stipulated in GB/T 3857, the test solvent is 10% sodium hydroxide solution, soak at room temperature (10～35) ℃ for 168 h or add
After soaking at (80±2)℃ for 24 hours, determine the appearance quality of the sample.
Note. If the above chemical solvent resistance test has a special use environment, the concentration of the test solution and the test period can be determined according to the negotiation results of the two parties.
5.2.5 Environmental adaptation performance test
5.2.5.1 Humidity and heat resistance test
Carry out according to the method specified in 4.2 of GB/T 2573-2008, select the constant humidity and heat test conditions, temperature (60±2) ℃; relative humidity
93%±2%, the test is carried out with a test cycle of 24 h, generally no less than 10 consecutive cycles.
5.2.5.2 Low temperature drop resistance test
Place the sample with a length not less than 300 mm or not less than 50% of the total sample length in a low temperature test box, and the temperature is reduced to -40 ℃ ±
After 2 ℃, keep the temperature constant for 2 hours and then take out the sample. The length direction of the sample or the front side of the sample is parallel to the ground from a height of 1 m to the hard ground.
Observe and check the appearance quality and sample size.
5.2.5.3 High temperature resistance performance test
Place the bridge sample in the test box at (70±5)°C for 24 h and then take it out. Visually inspect the appearance quality.
5.2.5.4 Artificial accelerated aging test (xenon arc light source)
The artificial accelerated aging test is carried out in accordance with the provisions of GB/T 16422.2.
5.2.6 Impact test
5.2.6.1 Test product requirements
The test is carried out on test samples of cable trays or cable ladders with a length of (250±5) mm and a quantity of three.
5.2.6.2 Test sample layout
The test layout is shown in Figure 1.
5.2.6.3 Test conditions
For bridges made of glass fiber reinforced plastics or composite materials, a continuous 168 h, (60±2) ℃ aging test should be carried out before the test, and then the test product
Put it into the low temperature test box, the temperature in the box should be maintained at (-20±2) ℃, after 2 h, take out the sample in turn, within (10±1) s
Complete the test.
5.2.6.4 Test method
The three samples were subjected to impact tests on the bottom and two sides respectively, and the impact positions were the bottom and the middle of both sides respectively.
The installation requirements of the test product should meet the requirements of GB/T 2423.55-2006.
The severity level is assessed in accordance with the provisions of GB/T 2423.55-2006 and the impact energy value of 10 J. The number of impacts is one for each.
5.2.6.5 Test results
After the impact test, there should be no deformation and cracks affecting the safe use of the sample.
5.3 Mechanical load test
5.3.1 Mechanical load test of straight section and straight section joint
5.3.1.1 General requirements
The mechanical load test of the bridge frame can be based on the partial load of the straight section joint. When the test passes, the straight section and the bend
No mechanical load test is required.
Verify the reliability of the structural strength of the pallet and ladder frame when installed horizontally according to the safe working load (SWL) given in Table 9.
5.3.1.2 Sample requirements
The sample is a straight section, no less than two pieces and necessary connecting pieces. The distance between supports and hangers and the value of safe working load are in accordance with Table 9.wort it
The load tests of the joints of the straight section and the straight section are arranged according to Figure 2 and Figure 3 respectively.
Note. The test support can also be a steel support, the contact width is (45±5) mm, and the length matches the width of the bridge.
5.3.1.3 Test load requirements
Weights, steel bars, loaders or other non-continuous rigid materials can be used. The steel bar can be 3 mm thick, 30 mm～50 mm wide, and the length is not large
For flat steel of 500 mm, the width of other load materials shall not exceed 125 mm, the length shall not exceed 300 mm, and the maximum weight of each piece shall not exceed 5 kg.
All loads should be evenly distributed on the test sample, even when the test sample is extremely deformed, the load should be evenly distributed
(Ie UDL).
The load test is carried out at ambient temperature. If the user requests or the relative mechanical properties of the material used are greater than the specified temperature
When the maximum and minimum characteristics are ±5% of the average value caused by the change in the temperature range, the low temperature and high temperature test shall be carried out according to GB/T 21762.
5.3.1.4 Load
The loading is divided into two methods. normal loading and ultimate loading. The normal loading load shall be in accordance with the safe working load (SWL) given in Table 9.
When the hanger spacing is greater than 3 m, the safe working load value provided by the manufacturer’s product technical conditions shall be followed; the ultimate load shall be in accordance with the safety given in Table 9
1.5 times the full working load (SWL), select the normal load mode when there is no special user requirement. In order to facilitate the loading of the ladder frame, a thickness of 1 mm is allowed,
The steel plate or net plate with a length of not more than 1 m is placed on the inner crosspiece of the span of the support. Two steel plates cannot be overlapped, and the weight of the steel plate shall be included in the test
The total weight of the load. The distance between the load and the side of the specimen is 10 mm～15 mm.
The load is applied to each test sample through the load block, and it is continuously increased to the safe working load (SWL) in both the transverse and longitudinal directions.
Each increment cannot exceed 1/4 of the safe working load (SWL).
5.3.1.5 Test results
5.3.1.5.1 After the test load is added to the rated value, the supports and hangers and the test piece are adjusted steadily, and the center value of the two sides located in the middle of the span is measured.
The average deflection value should meet the requirements of Table 9, and the accuracy grade is 0.1 mm.
5.3.1.5.2 After the test is completed, the test load is removed, and the bridge frame should not have obvious permanent deformation.
5.3.2 Mechanical load test of elbow
The test layout is shown in Figure 4, the test method is the same as 5.3.1, and the test result judgment is the same as 5.3.1.5.
The r, s, and t points for detecting the deflection value should be located in the middle of the supporting end. The deviation should not exceed 1/100 of the distance between the two supporting ends. When two
When there is an arc between the supporting ends, the deviation (from point a to point b in Figure 4 b) should not exceed 1/100 of the arc distance between a and b.
6 Inspection rules
6.1 Inspection classification
The inspection of the bridge is divided into two types. type inspection and factory inspection.
6.2 Type inspection
6.2.1 The purpose of the type inspection is to verify whether the performance of the bridge frame meets the technical requirements of this standard. Type in one of the following situations
test.
a) When a new product is tested for type identification or an old product is transferred to a factory;
b) After the product is put into production, if there are major changes in structure, materials, and processes, which may affect the performance of the product;
c) When the national quality supervision agency puts forward the type inspection requirements;
d) When the product is out of production for more than one year or in normal production, the inspection shall be carried out at least once a year.
6.2.2 Type inspection items include.
a) Inspection of appearance and manufacturing accuracy (see 5.1);
b) Oxygen index performance test (see 5.2.1);
c) Tensile strength performance test (see 5.2.2.1);
d) Flexural strength performance test (see 5.2.2.2);
e) Water resistance test (see 5.2.3);
f) Gasoline resistance performance test (see 5.2.4.1);
g) Acid resistance test (see 5.2.4.2);
h) Alkali resistance performance test (see 5.2.4.3);
i) Humidity and heat resistance test (see 5.2.5.1);
j) Low-temperature drop resistance test (see 5.2.5.2);
k) High temperature resistance test (see 5.2.5.3);
l) Artificial accelerated aging test (see 5.2.5.4);
m) Impact resistance test (see 5.2.6);
n) Mechanical load test (see 5.3).
6.2.3 Qualified judgment rules for type inspection
All required inspection items can be passed before the bridge type inspection is considered qualified.
6.3 Factory inspection
The bridge frame must be inspected by the manufacturer's quality inspection department and the certificate can be attached before leaving the factory.
6.3.1 Factory inspection items
The factory test items include the following.
a) Visual inspection (see 5.1.1);
b) Thickness inspection (see 5.1.2);
c) Inspection of manufacturing accuracy (see 5.1.2).
6.3.2 Qualification judgment rules for factory inspection
6.3.2.1 The method of achieving all the indicators of the specified items in the factory inspection shall be adopted. All indicators of the specified items of the factory inspection meet the requirements. If bridge
The factory inspection of a certain batch of products does not meet the requirements of this standard. After reworked one by one, the inspection will be carried out until it meets the requirements.
6.3.2.2 In the factory inspection items, a) is full inspection; b) and c) are sampling inspection (see 6.3.1).
6.4 Sampling and judgment
6.4.1 The products of the same material, same technology, same specification and same production batch are one batch.
6.4.2 The samples shall be randomly sampled in the same batch, and the number of random i...
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