GB/T 2992-1998 Shapes and dimensions of general purpose refractory bricks
Some standard content:
ICS_81.080
National Standard of the People's Republic of China
GB/T2992-1998
Dimensions of general bricks1998-12-14 Issued
Implementation on 1999-08-01
Issued by the State Administration of Quality and Technical Supervision
GB/T2992—1998
This standard is a revision of GB/T2992—1982 "Shapes and dimensions of general refractory bricks", GB/T1590--1979 "Shapes and dimensions of magnesia bricks and magnesia-silica bricks" and GB/T2074--1980 "Shapes and dimensions of magnesia-chrome bricks for copper smelting furnaces", and merges them into one standard. This standard adopts the international standards ISO5019-1:1984 "Refractory Bricks - Dimensions - Part 1: Straight Bricks"; ISO5019-2:1984 "Refractory Bricks - Dimensions - Part 2: Wedge Bricks", ISO5019-5:1984 "Refractory Bricks - Dimensions - Part 5: Arch Bricks". In addition to the international standard 230mm and 345mm, this standard also retains the Chinese 300mm, 380mm and 460mm brick lengths, and the international standard 114mm and 150mm brick widths. The brick thickness is 65mm and 75mm. This standard has made the following revisions to the above three original standards: - The names and main size parameters of bricks are defined in words and expressed in drawings or formulas. - The brick numbers are modified and the codes are cancelled. - The calculation methods in the appendix of the original standard are simplified and improved, and rewritten as Appendix A. - 75mm and other intermediate sizes of vertically thick wedge bricks and straight bricks are added. The size of the arch foot bricks with inclined surface length of 230mm, 300mm, 380mm and 460mm has been modified, and the standard inclination angle is 60/30° and 50%/40%. The non-universal special-shaped bricks are deleted. This standard replaces GB/T2992-1982, GB/T1590-1979 and GB/T2074-1980 from the date of implementation. Appendix A of this standard is the appendix of the standard. This standard was proposed by the former Ministry of Metallurgical Industry. This standard is under the jurisdiction of the National Technical Committee for Standardization of Refractory Materials. The responsible drafting unit of this standard is Wuhan Iron and Steel (Group) Corporation. The main drafters of this standard are Xue Qiwen, Wan Xiaoping, Gong Jiaxue, Gao Jianping and Fang Zhengguo. I
1 Scope
National Standard of the People's Republic of China
Dimensions of general bricks
Dimensions of general bricks This standard specifies the definition, brick number, specification representation, dimensions and dimensional parameters of general refractory bricks. This standard is applicable to brick linings of thermal equipment such as industrial furnaces. 2 Definitions
This standard adopts the following definitions.
GB/T2992—1998
neqIS05019-1:1984
neq ISO 5019-2:1984
neq ISo 5019-5:1984
Replaces GB/T2992-1982
GB/T1590--1979
GB/T2074--1980
2.1 General purpose refractory bricks refer to straight bricks, side thick wedge-shaped bricks, vertical thick wedge-shaped bricks, vertical wide wedge-shaped bricks and arch foot bricks used for vertical wall brickwork and radial brickwork of thermal equipment such as industrial furnaces. 2.1.1 Straight brick: a straight parallelepiped brick with length 6, width α and thickness c, see Figure 1. 2.1.2 Side thick molded brick (abbreviated as side wedge brick): a wedge-shaped brick with the distance b between the big and small ends designed in width and the size a*/a* of the big and small ends designed in thickness, see Figure 2.
Figure 1 Straight brick
Figure 2 Side thick wedge brick
2.1.3 Vertical thick brick (abbreviated as vertical wedge brick): a wedge-shaped brick with the distance 6 between the big and small ends designed in length and the size α of the big and small ends designed in thickness, see Figure 3.
2.1.4 Vertical wide wedge brick (abbreviated as wide wedge brick): a wedge-shaped brick with the distance 6 between the big and small ends designed in length and the size α of the big and small ends designed in width, see Figure 4.
2.1.5 Arch foot brick: a load-bearing brick smaller than the two sides of the semicircular arch brickwork, see Figure 5. Approved by the State Administration of Quality and Technical Supervision on December 14, 1998, and implemented on August 1, 1999
Figure 3 Vertical thick wedge-shaped bricks
GB/T 2992—1998
Figure 5 Arch foot bricks
2.2 Equal intermediate dimensions: dimensions with equal average values of the large and small ends of wedge-shaped bricks. 3 Brick number and specification representation
3.1 Brick number T is the Chinese phonetic prefix for general bricks, and the sequence number is after the short dash. 3.2 Specification representation:
3.2.1 The specifications of straight bricks are represented by b×aXc. 3.2.2 The specifications of wedge-shaped bricks are represented by 6×(a*/asmall)Xc. 3.2.3 The specifications of arch foot bricks are represented by LXaXc. 4 Brick size and size parameters
Figure 4 Vertical wide molded bricks
4.1 The brick number, size, specification and size parameters of the straight brick (see Figure 1) shall be as specified in Table 1. 4.2 The brick number, size, specification and size parameters of the side thick wedge brick (see Figure 2) shall be as specified in Table 2. 4.3 The brick number, size, specification and size parameters of the vertical thick wedge brick (see Figure 3) shall be as specified in Table 3. The brick number, size, specification and size parameters of the vertical wide wedge brick (see Figure 4) shall be as specified in Table 4. 4.4
4.5 The brick number, size and specification of the arch foot brick (see Figure 5) shall be as specified in Table 5. 2
GB/T2992—1998
Table 1 Straight bricks
Amount of radius increase of a straight brick
[(AR),
Matching size is a
172×114×65
230×114×32
230X114×65
230×172×65
172×114×75
230×114×75
230×150×75
230×172×75
300 ×150×65
300×150×75
300×225×75
345×114×65
345X150×75
380X150×65
380×150×75
380X×225×75
460X150×65
460X150×75
460×225×75
For straight bricks matched with vertical thick wedge bricks or side thick wedge bricks, the matching dimension a is equal to its thickness c,For straight bricks matched with vertical width changing bricks, the matching dimension a is equal to its width a.
2For bricks not longer than 345mm, the brick joint thickness 8 is 1mm; for bricks not less than 380mm, the brick joint thickness 8 is 2mm.
ax/a small
114×(65/35)X230
29921998
Side thick molded brick
Outer radius
(a*+8)6
114×(65/45)×230
114×(65/55)×230
114×(75/45)X230
114×(75/55)×2 30
114×(75/65)×230
150×(65/35)×300
150×(65/45)X300
150×(65/55)×300
150X(75/45)X300
150×(75/55)×300
150×(75/65)X300
Note: outer radius R. In the calculation formula, the brick joint thickness 8 is taken as 1mm. Table 3
ax/a small
230×(65/35))×114
230×(65/45)×114
230×(65/55)× 114
230×(65/60)×114
230×(65/35)×172
230×(65/45)X172
23 0×(65/55)X172
230×(75/45)×114
230×(75/55)×114
230×(75/65)×1 14
230X(75/70)X114
230×(75/45)×172
230×(75/55)×172
230× (75/65)×172
230×(90/60)×114
ax-a small
Limit number of blocks per ring
a large-a small
Vertical thick wedge brick
Outer radius
(at+8)6
a±—a small
Limit number of blocks per ring
a±-ak
Inclination angle
1 80(a±-a small)
tilt angle
180(a±-a)
a/a small
90/60*
80/70*
9 0/60*
80/70*
90/60°
85/65°
80/70*
80/70*
GB/T 29921998
Table 3 (continued)
Outer radius
(a*+8)
ax—a small
230×(85/65)×114
230×(80/70)×114| |tt||230X (90/60) 5/45)×150
300×(65/55)X150
300×(65/60)×150
300×(65/35)×225
|tt||300×(65/55)×225
300×(75/45)×150
300×(75/55)×150)
300×(75/65)×150
300×( 75/70)×150
300×(75/45)×225
300×(75/55)×225
300×(75/65)X225
300×(90/60)×150
300×(85/65)×150
300×(80/70)×150
300×(90/60)×225
300×(85/65)X225
300X( 80/70)X225
380×(80/50)×150
380×(80/60)×150
380×(80/70)×150
380×(80/75)X150
380×(70/60)×150
380×(80/50)X225
380×(80/60)X225
Maximum number of blocks per ring
at—a small
94:248
Tilt angle
180 (a-a small)
ax/a small
80/70°
90/60*||tt ||90 /60*
90/60*
80/70*
90/60*
80/70*
GB/T2992—199 8
Table 3 (End)
Outer radius
Re-(ax+8)5
aa small
380×(80/70) ×225||t t||380X(90/60)×150
380×(85/65)X150
380×(90/60)×225
380× (85/65)X225
460×(90/60)×150
460×(80/60)×150
460×(80/70) X150
460×(80/75)×150
460×(70/60)×150
460X(90/60)×225||t t||460×(80/60)×225
460X(80/70)X225
460×(85/65)×150
460×(85/65) ×225
Limit number of blocks per ring
4-4 small
Tilt angle
180(a±a)
* is equal intermediate size.
Outer radius R. In the calculation formula, for bricks not longer than 345mm, the brick joint thickness is 1mm; for bricks not less than 380mm, the brick joint thickness is 2mm.
Vertical width molded bricks
ax/a small
114/74
114/94
114/104
150/ 135
114/69
114/84||tt ||114/99
150/130
150/90
150/120
230×(114/74)×65
230× (114/94)X65
230×(11 4/104)X65
230×(150/135)×65
345×(114/69)×65
345×(114/84)X65||tt| |345×(114/99)×65
345×(150/130)×65
230×(150/90)×75
230×(150/120) ×75
Outer radius
(a±+8)
Limited number of blocks per ring
a*—a small
tilt angle
180 (a large — a small)
a/a small
150/135
114/104||tt| |150/90
150/110
150/130
114/99
GB/T29921998
Table 4 (end)||tt| |Outer radius
(at+8)
230×(150/135)×75
230×(114/104 )×75
345X(150/90)X75
345×(150/110)×75
345×(150/130)×75
345X( 114/99)X75
Limited number of blocks per ring
aa small
Inclination angle
180(a—ak)
Note: Outer radius R In the calculation formula, for bricks not longer than 345mm, the thickness of the brick joint is 1mm. For bricks not shorter than 380mm, the thickness of the brick joint is 2mm. , mm
Note. 1) The inclined plane length L is a reference dimension. d
Tilt angle α/β
230X60°×114
230×50°×114
300×60°×73
300×50 °×73
380×60°×73
380×50°×73
460×60×73
460×50°×73||tt| |GB/T2992—1998
Appendix A
(Standard Appendix)
Calculation of Radial Brickwork
To facilitate and simplify the calculation of radial brickwork, Here are simplified calculation formulas and examples based on the dimensional parameters of this standard. A1 Calculation of mixed brickwork
In mixed brickwork with wedge-shaped bricks and straight bricks, the number of molded bricks K and the number of true bricks K are calculated by formula (A1) and formula (A2):
In the formula, 9 is the central angle of mixed brickwork, () K is the limit number of molded bricks used;
R. The outer radius of the molded bricks used, mm; || tt||e(RR)
360(AR)bzxZ.net
(AR),——the increase in the radius of one brick of the straight brick used, mm; R is the outer radius of the mixed brickwork, mm, then R>R. . . (A1)
Example 1: The inner radius is 2500mm, the working lining is 230mm circular brickwork, and the thickness of the thermal insulation lining is 114mm. Calculate the number of bricks per layer.
Working lining: outer radius R=2500mm+230mm=2730mm, which is larger than the R of the vertical width molded brick T-113 with specification of 230mm×(114/104)mmX65mm. (See Table 4, R. = 2645.0mm, K = 144.514 pieces), with straight bricks T-3 with specifications of 230mm×114mm×65mm. See Table 1, T-3's (AR) = 18.30mm ( At this time, the masonry size is 114mm). The number of bricks in each layer is calculated according to formula (A1) and formula (A2): Kt-1a
360×144.514
360(2730-2645)|| tt||Insulation outer lining: R = 2730mm + 114mm + 2mm = 2846mm, which is larger than the R of the side-thick wedge brick T-23 with a specification of 114mm × (65/55) mm × 230mm. (See Table 2, R. = 752.4mm), at this time K-71.628 pieces. According to Table 1, (AR) of T-3 = 10.50mm (the masonry size is 65mm at this time). The number of bricks in each layer is calculated according to formula (A1) and formula (A2): 360×71.628= 71.6||tt| |360(2846-752.4)199.4
Example 2: For a door arch with a center angle of 100 and an outer radius of R = 3500mm, a staggered arch with a length of 230mm and a width of 460mm is used. Calculate the brick quantity.
According to Table 3 of this standard If R>1518.0mm, vertical thick wedge brick T-43 with specifications of 230mm×(65/55)mm×114mm and straight brick T-3 with specifications of 230mm×114mm×65mm should be used. , =1518.0mm, Km=144.514 pieces. From Table 1, we can find (△R) = 10.50mm (when the matching size is 65mm). Substituting into formula (A1) and formula (A2), we can get: 100X 144.514= 40.1
100(3500-1518)|| tt||GB/T2992—1998
Take the number of whole bricks, T-43 takes 40 pieces, T-3 takes 53 pieces. 460mm wide staggered arch adopts 172+172+114 masonry method, the specification is 230× Take 2×53=106 pieces of 172×65 staggered straight wide bricks T-4, and take 2×40-80 pieces of 230×(65/55)×172 staggered vertical thick molded bricks T-47 .
The design inclination angle of the arch top and arch foot bricks with a center angle of 0=100° is 90°-(100/2)°=40°. At this time, the arch foot bricks with a specification of 230mm×50%X114mm are used. The other complementary angle of 132 (i.e. β = 40° as the inclination angle of the arch foot brick). At this time, 8 pieces of T-132 are taken from the arch of this door. Calculation of A2 double-mode brickwork
Two modes In a double wedge brick masonry with a combination of wedge-shaped bricks, the number of wedge bricks with a large radius K* and the number of wedge bricks with a small radius K are calculated according to formula (A3) and formula1
100(3500-1518)
GB/T2992—1998
Take the number of whole bricks, T-43 takes 40 pieces, T-3 takes 53 pieces. The 460mm wide staggered arch adopts the 172+172+114 masonry method, then the staggered straight wide brick T-4 with the specification of 230×172×65 takes 2×53=106 pieces, and the staggered vertical thick molded brick T-47 with the specification of 230×(65/55)×172 takes 2×40-80 pieces.
The design inclination angle of the arch top and arch foot bricks with a center angle of 0=100° is 90°-(100/2)°=40°. At this time, the other complementary angle of the arch foot brick T-132 with a specification of 230mm×50%X114mm (that is, β=40° is used as the inclination angle of the arch foot brick). At this time, 8 pieces of T-132 are taken in this arch. Calculation of A2 double-mode brickwork
In the double wedge brickwork with two types of molded bricks, the number of large-radius wedge bricks K* and the number of small-radius wedge bricks K are calculated according to formula (A3) and formula1
100(3500-1518)
GB/T2992—1998
Take the number of whole bricks, T-43 takes 40 pieces, T-3 takes 53 pieces. The 460mm wide staggered arch adopts the 172+172+114 masonry method, then the staggered straight wide brick T-4 with the specification of 230×172×65 takes 2×53=106 pieces, and the staggered vertical thick molded brick T-47 with the specification of 230×(65/55)×172 takes 2×40-80 pieces.
The design inclination angle of the arch top and arch foot bricks with a center angle of 0=100° is 90°-(100/2)°=40°. At this time, the other complementary angle of the arch foot brick T-132 with a specification of 230mm×50%X114mm (that is, β=40° is used as the inclination angle of the arch foot brick). At this time, 8 pieces of T-132 are taken in this arch. Calculation of A2 double-mode brickwork
In the double wedge brickwork with two types of molded bricks, the number of large-radius wedge bricks K* and the number of small-radius wedge bricks K are calculated according to formula (A3) and formula514 pieces), with straight bricks T-3 of 230mm×114mm×65mm, refer to Table 1, T-3 (AR), = 18.30mm (the masonry size is 114mm at this time), the number of bricks in each layer is calculated according to formula (A1) and formula (A2): Kt-1a
360×144.514
360(2730-2645)
Insulation outer lining: R=2730mm+114mm+2mm=2846mm, which is larger than the R of the side-thick wedge-shaped brick T-23 of 114mm×(65/55)mm×230mm (refer to Table 2, R.=752.4mm), at this time K-71.628 pieces. Refer to Table 1, T-3 (AR), = 10.50mm (the masonry size is 65mm at this time). The number of bricks in each layer is calculated according to formula (A1) and formula (A2): 360×71.628= 71.6
360(2846-752.4)199.4
Example 2: For a door arch with a center angle of 100 and an outer radius of R=3500mm, a staggered arch with a length of 230mm and a width of 460mm is used. Calculate the number of bricks.
From Table 3 of this standard, it is known that R>1518.0mm, and the vertical thick wedge brick T-43 with a specification of 230mm×(65/55)mm×114mm and the straight brick T-3 with a specification of 230mm×114mm×65mm should be used. From Table 3, it is found that R,=1518.0mm, Km=144.514 pieces. From Table 1, it is found that (△R),=10.50mm (when the matching size is 65mm). Substituting into formula (A1) and formula (A2), we get: 100X 144.514= 40.1
100(3500-1518)
GB/T2992—1998
Take the number of whole bricks, 40 for T-43 and 53 for T-3. The 460mm wide staggered arch adopts the 172+172+114 masonry method, then 2×53=106 pieces of staggered straight wide bricks T-4 with specifications of 230×172×65 are taken, and 2×40-80 pieces of staggered vertical thick molded bricks T-47 with specifications of 230×(65/55)×172 are taken.
The design inclination angle of the arch top and arch foot bricks with a center angle of 0=100° is 90°-(100/2)°=40°. At this time, the other complementary angle of the arch foot brick T-132 with a specification of 230mm×50%X114mm (that is, β=40° is used as the inclination angle of the arch foot brick). At this time, 8 pieces of T-132 are taken in this arch. Calculation of A2 double-mode brickwork
In the double wedge brickwork with two types of molded bricks, the number of large-radius wedge bricks K* and the number of small-radius wedge bricks K are calculated according to formula (A3) and formula514 pieces), with straight bricks T-3 of 230mm×114mm×65mm, refer to Table 1, T-3 (AR), = 18.30mm (the masonry size is 114mm at this time), the number of bricks in each layer is calculated according to formula (A1) and formula (A2): Kt-1a
360×144.514
360(2730-2645)
Insulation outer lining: R=2730mm+114mm+2mm=2846mm, which is larger than the R of the side-thick wedge-shaped brick T-23 of 114mm×(65/55)mm×230mm (refer to Table 2, R.=752.4mm), at this time K-71.628 pieces. Refer to Table 1, T-3 (AR), = 10.50mm (the masonry size is 65mm at this time). The number of bricks in each layer is calculated according to formula (A1) and formula (A2): 360×71.628= 71.6
360(2846-752.4)199.4
Example 2: For a door arch with a center angle of 100 and an outer radius of R=3500mm, a staggered arch with a length of 230mm and a width of 460mm is used. Calculate the number of bricks.
From Table 3 of this standard, it is known that R>1518.0mm, and the vertical thick wedge brick T-43 with a specification of 230mm×(65/55)mm×114mm and the straight brick T-3 with a specification of 230mm×114mm×65mm should be used. From Table 3, it is found that R,=1518.0mm, Km=144.514 pieces. From Table 1, it is found that (△R),=10.50mm (when the matching size is 65mm). Substituting into formula (A1) and formula (A2), we get: 100X 144.514= 40.1
100(3500-1518)
GB/T2992—1998
Take the number of whole bricks, 40 for T-43 and 53 for T-3. The 460mm wide staggered arch adopts the 172+172+114 masonry method, then 2×53=106 pieces of staggered straight wide bricks T-4 with specifications of 230×172×65 are taken, and 2×40-80 pieces of staggered vertical thick molded bricks T-47 with specifications of 230×(65/55)×172 are taken.
The design inclination angle of the arch top and arch foot bricks with a center angle of 0=100° is 90°-(100/2)°=40°. At this time, the other complementary angle of the arch foot brick T-132 with a specification of 230mm×50%X114mm (that is, β=40° is used as the inclination angle of the arch foot brick). At this time, 8 pieces of T-132 are taken in this arch. Calculation of A2 double-mode brickwork
In the double wedge brickwork with two types of molded bricks, the number of large-radius wedge bricks K* and the number of small-radius wedge bricks K are calculated according to formula (A3) and formula
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