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3.4 Types and Arrangement of Anchors

3.4.1 Cylindrical anchors,end plates and hexmesh shall be used as the anchor assembly for double layer heat‐insulating and abrasion‐resistant lining with hexmesh,and shall comply with the following requirements:

1 The specification of cylindrical anchor shall conform to Figure 3.4.1‐1;

2 The specification of end plate shall conform to Figure 3.4.1‐2;

3 The arrangement of cylindrical anchors shall conform to Figure 3.4.1‐3;

4 The size of hexmesh should be 1200mm×3000mm,the thickness of steel strip should be 1.75mm or 2mm,and the width of steel strip should be 20mm or 25mm;

Figure3.4.1‐1 Cylindrical Anchor

δ2—Thickness of Heat‐insulating Layer(mm)

Figure3.4.1‐2 End Plate

5 The typical structural form of hexmesh shall conform to Figure 3.4.1‐4.If other structural form is used,it shall be specified in the design documents.

Figure3.4.1‐3 Arrangement of Cylindrical Anchors

Figure3.4.1‐4 Hexmesh

3.4.2 Ω‐anchor(Figure 3.4.2)should be used as the anchor for single‐layer heat‐insulating and abrasion‐resistant lining without hexmesh,and dual‐layer ring anchor(Figure 3.4.4)may also be used.The arrangement ofΩ‐anchors shall conform to Figure 3.4.2(b),and the arrangement of dual‐layer ring anchors shall conform to Figure 3.4.3‐2(b).

Figure3.4.2 Ω‐Anchor

1—Soft rubber cap;2—Ω‐anchor;δ—Thickness of lining(mm)

3.4.3 One or more combinations of anchors shall be selected for single layer abrasion‐resistant lining or highly abrasion‐resistant lining without hexmesh based on the shape of location where anchors are used,and the specifications and arrangements of anchors shall comply with the following requirements:

1 The specifications and arrangement of Y‐anchors shall conform to Figure 3.4.3‐1.

2 The specifications and arrangement of ring anchors shall conform to Figure 3.4.3‐2.

3 The specifications and arrangement of S‐anchors shall conform to Figure 3.4.3‐3.

Figure3.4.3‐1 Y‐Anchor

Figure3.4.3‐2 Ring Anchor

Figure3.4.3‐3 S‐Anchor

4 The specifications and arrangement of V‐anchors shall conform to Figure 3.4.3‐4.

Figure3.4.3‐4 V‐Anchor

3.4.4 Dual‐layer ring anchor(Figure 3.4.4)shall be used as anchor for double layer heat‐insulating and abrasion‐resistant lining without hexmesh and the arrangement of dual‐layer ring anchors shall conform to Figure 3.4.3‐2(b).

Figure3.4.4 Dual‐layer Ring Anchor

1—Stud bolt;2—Ring anchor; δ —Total thickness of heat‐insulating and abrasion‐resistant lining; δ 2 —Thickness of heat‐insulating layer(mm)

3.4.5 Number of anchors required per square meter of lining shall conform to Table 3.4.5.

Table 3.4.5 Number of Anchors Required

Note:The spacing between dual‐layer ring anchors is the top center‐to‐center spacing,and the number of dual‐layer ring anchors requiredis also calculated per the top surface area. ruqMMm4KpjDQVl/gs3SOsLkXok4h5P0iq0p5g1uqMPHfRInoZGGqdAApA31ra7BH



3.5 Thickness of Lining

3.5.1 The thickness of abrasion‐resistant concrete or highly abrasion‐resistant concrete for double layer heat‐insulating and abrasion‐resistant lining with hexmesh should be 26mm or 31mm,the thickness of abrasion‐resistant concrete or highly abrasion‐resistant concrete for double layer heat‐insulating and abrasion‐resistant lining without hexmesh should be 20mm or 25mm,and the thickness of highly abrasion‐resistant concrete at the locations subject to severe erosion shall be in accordance with Article 3.2.7 of this Code.

3.5.2 The thickness of single layer heat‐insulating and abrasion‐resistant lining without hexmesh should not be less than 80mm,and the thickness of single layer abrasion‐resistant or highly abrasion‐resistant lining with or without hexmesh should be 20mm or 25mm.

3.5.3 The total thickness of lining may be calculated by the following equation:

Where t i ———fluid temperature,℃;

t 0 ———average local annual air temperature,℃;

t w ———temperature of metal wall of equipment or piping,℃;

α 0 ———coefficient of convective and radiant thermal conductivity between metal wall and air,W/(m 2 ·K);

δ ———total thickness of lining,m;

δ 1 ———thickness of abrasion‐resistant or highly abrasion‐resistant concrete,m;

λ 1 ———coefficient of thermal conductivity of abrasion‐resistant or highly abrasion‐resistant concrete,W/(m·K);

λ 2 ———coefficient of thermal conductivity of heat‐insulating concrete,W/(m·K).

3.5.4 The thickness of heat‐insulating concrete of double layer lining shall be the total thickness of lining minus the thickness of abrasion‐resistant or highly abrasion‐resistant concrete. ruqMMm4KpjDQVl/gs3SOsLkXok4h5P0iq0p5g1uqMPHfRInoZGGqdAApA31ra7BH



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Lining Materials

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