This standard specifies the classification, technical requirements, test methods, inspection rules and storage of casting insulation riser sleeves. This standard is applicable to insulation riser sleeves for steel castings, and can also be used as a reference for other castings. CB/T 3716-1995 Casting insulation riser sleeves CB/T3716-1995 Standard download decompression password: www.bzxz.net

Shipbuilding Industry Standard of the People's Republic of China
CB/T3716-1995
Casting Insulation Riser Sleeves
19506.1Published in
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Shipbuilding Industry Standard of the People's Republic of China
Casting Insulation Riser Sleeves
1Subject Content and Scope of Application
CB/T3716-1995
Classification Number: U05
This standard specifies the classification, technical requirements, test methods, inspection rules and storage and preservation of casting insulation riser sleeves. This standard applies to heat-insulating riser sleeves for steel castings, and other castings can also refer to it. 2 Reference standards
GB3001 Test method for flexural strength of refractory products at room temperatureGB4758.6 Test method for moisture content of clay and high-aluminum refractory plasticsGB5071 Test method for true density of refractory materialsGB5072 Test method for compressive strength of dense shaped refractory products at room temperatureGB7322 Test method for refractoriness of refractory materialsGB10325 Rules for stacking, sampling, acceptance, storage and transportation of refractory productsGB10326 Inspection method for size, appearance and section of refractory productsTJ36 Hygiene standard for industrial enterprise design
ZBQ45007 Test method for thermal conductivity
3 Terms and symbols
3.1 Terms
3.1.1 Heat-insulating riser sleeves
Riser sleeves made of thermal insulation (or heat-insulating) materials. Its function is to prolong the solidification time of the liquid in the riser of the casting, so as to reduce the riser of the casting and improve the metal yield rate.
3.1.2 Safety height
The height of the shrinkage cavity in the riser from the root of the riser measured by process test is represented by the symbol H, as shown in Figure 1. Insulation riser sleeve
Root line of pipe mouth
3.2 Symbol
Approved by China State Shipbuilding Corporation on June 19, 1995 and implemented on April 1, 1996
Insulation riser sleeve inner diameter, mm;
Insulation riser sleeve height, mm;
Insulation riser sleeve length, mm;
Insulation riser sleeve width, mm;
Insulation riser sleeve Inner radius, mm;
Thickness of insulation riser sleeve, mm;
Height of sand table of insulation riser sleeve, mm;
CB/T3716-1995
Diameter of outlet hole of insulation riser sleeve, mm; Center distance of insulation riser sleeve, mm;bZxz.net
d—root diameter of insulation riser sleeve, mm;
D. Diameter of spherical insulation riser sleeve, mm;
M—modulus.
4 Product classification
4.1 Classification and code
Classification and code of insulation riser sleeve shall refer to Table 1.
Cylindrical exposed insulation riser sleeve
Cylindrical concealed insulation riser sleeve
Waist-shaped columnar exposed insulation pipe mouth sleeve
Waist-shaped columnar concealed insulation riser sleeve
Semi-cylindrical exposed insulation riser sleeve
Spherical insulation riser sleeve
4.2 Specifications and dimensions
4.2.1 The main specifications and dimensions of cylindrical exposed insulation riser sleeves shall be in accordance with Figure 2 and Table 2. x
CB/T3716—1995
Main structural dimensions, mm
The main specifications and dimensions of cylindrical concealed insulation riser sleeves shall be in accordance with Figure 3 and Table 3. Figure 3
CB/T3716
6-1995
Main structure dimensions, mm
The main specifications and dimensions of waist-shaped columnar exposed insulation riser sleeves shall be in accordance with Figure 4 and Table 4. H
District District District District
District District District District
CB/T3716-1995
Main structure dimensions, mm
The main specifications and dimensions of waist-shaped columnar concealed insulation riser sleeves shall be in accordance with Figure 5 and Table 5. Figure 5
CB/T3716-1995
Main structure dimensions, mm
The specifications and dimensions of semi-cylindrical insulation riser sleeves shall be in accordance with Figure 6 and Table 6. District District
CB/T3716-1995
Main structural dimensions, mm
4.2.6 The main specifications and dimensions of spherical thermal insulation riser sleeves shall be in accordance with Figure 7 and Table 7. Ds
CB/T3716-1995
Main structural dimensions, mm
4.2.7 For thermal insulation riser sleeves that are not designed with specified specifications or have special requirements, they shall be produced in accordance with A2 in Appendix A (reference). 4.3 Product marking
4.3.1 Model composition
Main structural dimension of product
-Position of product in casting
『M—Explicit insulation riser sleeve
LA—Hidden insulation riser sleeve
rU—Cylindrical
Product shape
Waist-shaped column
B—Semi-cylindrical
LQ—Spherical
Product name: Insulation riser sleeve
4.3.2 Marking example|| tt||The waist-shaped columnar insulation riser sleeve with dimensions of B=160mm, L=320mm, and H=240mm is expressed as: TYM160
5 Technical requirements
5.1 Material requirements
When selecting insulation riser sleeve materials, not only various performance indicators must be ensured, but also the physical and mental health of workers must be ensured. The concentration of harmful substances generated by the insulation riser sleeve at high temperature 8
CB/T3716-1995
should comply with the provisions of TJ36. 5.2 Manufacturing requirements
5.2.1 The structure and size of the insulation riser sleeve shall comply with the requirements of 4.2.1~4.2.7. 5.2.2 The surface of the insulation riser sleeve shall not have defects such as cracks or damage. 5.3 Performance requirements
The physical performance requirements of the insulation riser sleeve shall be in accordance with Table 8. Table 8
Density, kg/m2
Strength, MPa
Flexural strength at room temperature
Thermal conductivity, W/(m·K)
Refractory degree, ℃
Water content, %
6 Test methods
6.1 Material test
Performance index
≤800
≥1500
The test of harmful substances in insulation riser sleeve materials shall comply with the provisions of TJ36. 6.2 Performance test of insulation riser sleeve
6.2.1 Density test
The test method shall comply with the provisions of GB5071.
6.2.2 Strength test
Dry compression strength test shall be in accordance with GB5072, and room temperature flexural strength test shall be in accordance with GB3001.6.2.3 Thermal conductivity test shall be in accordance with ZBQ45007.
6.2.4 Refractoriness test shall be in accordance with GB7322.
6.2.5 Water content test shall be in accordance with GB4758.6.
6.3 Dimension and appearance test shall be in accordance with GB10326.6.4 Process performance test shall be in accordance with Appendix A (reference). 7 Inspection rules
7.1 Type inspection
Applicable to composite fiber insulation riser sleeve
Applicable to composite fiber insulation riser sleeve
a. When the material used to manufacture insulation riser sleeve changes and affects the performance index, type inspection shall be carried out; b. When used in the production of important castings, type inspection shall be carried out on the first batch of insulation riser sleeves. 7.2 Factory inspection
Factory inspection is carried out in batches, with 100 insulation riser sleeves as a batch. Three are sampled from each batch. If one of them fails, the number is doubled for inspection. If one still fails after double inspection, the batch of insulation riser sleeves is scrapped. 7.3 Type inspection and factory inspection items are as shown in Table 9.9
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