4.3 General Standards
4.3.1 Column inspection.
1 Scope：steel structure column inspection.
2 The equipment inspection shall be carried out by sampling some certain quantity devices in every steel structure layer to inspect columns，cross beams or supports.The inspection may not be carried out one by one.However，main girders and main columns shall be completely inspected.The specific sampling ratio can be determined jointly by the supervision company and the construction company.The sampling quantity shall represent the whole batch equipment quality distribution characteristics.The inspection shall be carried out as for columns，cross beams and supports with obvious deviations.
3 Quality criteria and inspection methods are shown in Table 4.3.1.
Table 4.3.1 Column lnspection
4.3.2 Inspection of cross beam and support.
1 Scope：inspection of steel structure cross beam and support.
2 Quality criteria and inspection methods are shown in Table 4.3.2.
Table 4.3.2 Inspection of cross beam and support
Table 4.3.2（Continued）
Note：L—Cross beam length.
4.3.3 Inspection of steel plate girder.
1 Scope：inspection of steel structure plate girder.
2 The quality criteriand inspection method are shown in Table 4.3.3.
Table 4.3.3 Inspection of Steel Plate Girder
Table 4.3.3（Continued）
Note：H—Steel plate girder height；L—Distance from center line of connecting bolts group holes to measurement datum line.
4.3.4 High-strength bolt connection.
1 Scope：steel structure high-strength bolt connections.
2 Quality criteria and inspection methods are shown in Table 4.3.4.
Table 4.3.4 High-Strength Bolt Connection
4.3.5 Inspection of hanging devices.
1 Scope：pre-erection inspection of bearing hanging devices（hangers）to boiler proper components（such as a drum，heating surfaces，headers，burners，proper pipes）.
2 Quality criteria and inspection methods are shown in Table 4.3.5.
Table 4.3.5 Inspection of Hanging Devices
4.3.6 Erection of hanging devices.
1 Scope：erection of bearing hanging devices（hanger）to boiler proper components（such as a drum，heating surfaces，headers，burners，proper pipes）.
2 Quality criteria and inspection methods are shown in Table 4.3.6.
Table 4.3.6 Erection of hanging devices
Table 4.3.6（Continued）
4.3.7 Inspection of heating surface equipment.
1 Scope：equipment inspection of boiler waterwalls，superheater，reheaters，economizers，steamsteam heaters，hanger tubes，and proper pipes.
2 Quality criteriaand inspection methods are shown in Table 4.3.7.
Table 4.3.7 Inspection of heating surface equipment
Table 4.3.7（Continued）
4.3.8 Inspection of boiler proper and attached pipes and equipment.
1 Scope：inspection of pipes including boiler proper down-comers，evaporating tubes，steam connecting pipes，feed water connecting pipes，recirculating pipes，attemperating water pipes.
2 Quality criteria and inspection methods are shown in Table 4.3.8.
Table 4.3.8 Inspection of boiler proper and attached pipes and equipment
Table 4.3.8（Continued）
4.3.9 Heating surface pipe butt joint.
1 Scope：inspection of pipes including boiler proper downcomers，evaporating tubes，steam connecting pipes，feed water connecting pipes，recirculating pipes，attemperating water pipes
2 Quality criteria and inspection methods are shown in Table 4.3.9.
Table 4.3.9 Heating surface pipe butt joint
Table 4.3.9（Continued）
Note：During pipe arrays butt joint process and if requirements are not met as for some certain pipe，it shall be consulted with the owner and the quality inspection station；and causes shall be specified.
4.3.10 Inspection and erection of boiler header（desuperheater）.
1 Scope：erection of knockdown parts for boiler superheater headers，reheater headers，waterwall headers steam collector headers，desuperheater headers and pressure component steam-water headers.2 Quality criteria and inspection methods are shown in Table 4.3.10.
Table 4.3.10 Inspection and erection of boiler header（desuperheater）
Table 4.3.10（Continued）
4.3.11 Inspection and lineation of auxiliary equipment foundation and erection of pad iron anchor Bolts.
1 Scope：theinspection and lineation of the auxiliary equipment foundation as well as the erection of pad iron anchor bolts
2 Quality criteriaand inspection methods are shown in Table 4.3.11.
Table 4.3.11 Inspection and lineation of auxiliary equipment foundation and erection of pad iron anchor bolts
Table 4.3.11（Continued）
Note：mfcu represents the concrete strength average value for the same acceptance batch，whose unit is in N/mm2；fcu，k represents the design concrete strength average value，whose unit is in N/mm2；and fcu，miu represents the concrete strength minimum value for the same acceptance batch，whose unit is in N/mm2.
4.3.12 Erection of coupling，pulley and sprocket.
1 Scope：erection of couplings，pulleys and sprockets in boiler auxiliary machineries.
2 Quality criteria and inspection methods are shown in Table 4.3.12.
Table 4.3.12 Erection of coupling，pulley and sprocket
Table 4.3.12（Continued）
Note：n—Coupling rotational speed.
4.3.13 Erection（Inspection）of reducer.
1 Scope：erection（inspection）of reducers in boiler auxiliary machineries.
2 Quality criteria and inspection methods are shown in Table 4.3.13.
Table 4.3.13 Erection（Inspection）of reducer
4.3.14 Subsection trial operation auxiliary machinery.
1 Scope：subsection trial operation of boiler auxiliary machinery.
2 Quality criteria and inspection methods are shown in Table 4.3.14.
Table 4.3.14 Subsection trial operation auxiliary machinery
Table 4.3.14（Continued）
4.3.15 Inspection of refractory and insulation material.
1 Scope：inspection of refractory and insulation material.
2 The inspection of insulation materials，refractory insulation pouring materials，wear-resistance refractory pouring materials，insulation bricks，wear-resistance refractory insulation bricks and test blocks shall be carried out by sampling some certain quantity of materials.Sampling materials shall be delivered to certified inspectors with the corresponding qualifications.The specific sampling ratio（s）shall be determined according to technical requirements and test methods of wear-resistance refractory material（DL/T 902-2004）or jointly determined by the supervision company and the construction company.and the random inspection quantity shall represent quality distribution characteristics of entire batch of materials.The inspection shall be carried out as for any material with any obvious deviation.
3 Quality criteria and inspection methods are shown in Table 4.3.15.
Table 4.3.15 Inspection of refractory and insulation material
4.3.16 Inspection of wear-resistance refractory materials and products.
1 Scope：inspection of wear-resistance refractory materials and products.
2 Quality criteria and inspection methods are shown in Table 4.3.16.
Table 4.3.16 Inspection of wear-resistance refractory materials and products
4.3.17 Inspection of insulation concrete test blocks.
1 Scope：inspection of insulation concrete test blocks.
2 Quality criteria and inspection methods are shown in Table 4.3.17.
Table 4.3.17 Inspection of insulation concrete test blocks
4.3.18 Inspection of rendering coat mortar test blocks.
1 Scope：Inspection of rendering coat mortar test blocks.
2 Quality criteria and inspection methodsare shown in Table 4.3.18.
Table 4.3.18 Inspection of rendering coat mortar test blocks
4.3.19 Inspection of refractory concrete test blocks.
1 Scope：inspection of refractory concrete test blocks.
2 Quality criteria and inspection methods are shown in Table 4.3.19.
Table 4.3.19 Inspection of refractory concrete test blocks
