3.2.1 Heat‐insulating and abrasion‐resistant linings shall be classified into the following types based on the lining structures and performance of lining concrete:

1 Double layer heat‐insulating and abrasion‐resistant lining with hexmesh[Figure 3.2.1(a)];

2 Single layer abrasion‐resistant or highly abrasion‐resistant lining with hexmesh[Figure 3.2.1(b)];

3 Double layer heat‐insulating and abrasion‐resistant lining without hexmesh[Figure 3.2.1(c)];

4 Single layer heat‐insulating and abrasion‐resistant lining without hexmesh[Figure 3.2.1(d)];

5 Single layer abrasion‐resistant or highly abrasion‐resistant lining without hexmesh[Figure 3.2.1(e)]．

3.2.2 Single layer heat‐insulating and abrasion‐resistant lining without hexmesh should be used as the lining structure for the following reactor generator system equipment:

1 Regenerator;

2 Coke combustor and withdrawal well;

3 Catalyst cooler;

4 Y‐shaped position of reactor riser;

5 Third‐stage cyclone/separator．

3.2.3 Double layer heat‐insulating and abrasion‐resistant lining with hexmesh should be used as the lining structure for the following reactor generator system equipment:

1 Orifice chamber;

2 Cold wall dipleg;

3 Slide valve;

4 Cold wall cyclone/separator．

3.2.4 Double layer heat‐insulating and abrasion‐resistant lining with hexmesh should be used and single layer heat‐insulating and abrasion‐resistantlining without hexmesh may be also used as the lining structure for the following reactor generator system equipment:

1 Reactor(disengager);

2 Reactor riser;

3 Standpipe;

4 Flue duct．

3.2.5 Single layer highly abrasion‐resistant lining with hexmesh should be used as the lining structure for the following reactor‐regenerator system equipment,operating conditions and similar positions:

1 Hot wall cyclone;

2 Hot wall dilute phase pipe;

3 Hot wall dipleg．

3.2.6 Single layer highly abrasion‐resistant lining without hexmesh shall be used as lining structure for the following locations subject to erosion due to high gas speed:

1 Air distribution pipes or distribution plates;

2 Thermowells of reactor riser．

3.2.7 For the locations subject to severe erosion such as outlet of slide valve,double layer heat‐insulating and abrasion‐resistant lining with hexmesh shall be used,highly abrasion‐resistant concrete shall be used for the abrasion‐resistant lining,and the thickness of abrasion‐resistant lining shall be increased． do1fb8sKRsjnLOZoVLhf1w9a3ydATBeZwDBV9VfdS+A6sZzf2XPmFfnQTVBBndwv