2.3　Construction Preparation

2.3.1　The following conditions shall be met before the construction of I﹠C device：

1　The construction drawings，the relevant technical documents and the manufacturer's technical documents shall be complete.

2　The construction drawings shall have already passed the joint check.

3　The professional design of construction organization has already been examined and approved.

4　The necessary construction manual，construction scheme and technical measures have already been examined and approved.

5　The I﹠C device，installation materials and construction equipments are basically available，the calibrating equipment has been qualified through verification and is in the validity period.

6　The technical intent handover and necessary technical training have already been carried out.

7　The environment at the construction site has already met the construction conditions of I﹠C device.

2.3.2　All the pipes，valves and pressure parts shall be inspected and cleaned before installation，therein，the alloy steel parts shall be carried out with spectral analysis and be marked.

2.3.3　Before installation，the high pressure and high temperature sampling valves shall be inspected according to the following requirements：

1　At least one valve among those in the same batch shall be inspected.

2　As for the valve core，valve seat and valve rod，their composition shall be inspected.

3　If any problem is found during inspection，the sampling inspection ratio shall be increased.

4　The sampling valves shall be carried out with sealing test，and the test criteria shall meet those specified in Appendix A.

2.3.4　The coordinates and dimensions of the equipment foundation，the preformed holes and embedded iron parts shall be checked.The opening of holes and the welding shall not be randomly carried out on the building structure，if they must be carried out in the construction，the approval of design department shall be obtained.

2.3.5　Before installing the instrument pipeline and measuring elements，the preformed holes of relevant disciplines and the installed sampling elements shall be checked.

2.3.6　The non-pressure parts shall not be welded on the pressure vessels and pipelines.

2.3.7　The installation of I﹠C device should be carried out after completing the construction procedures that may cause damages to I﹠C device，otherwise，appropriate protection and isolation measures shall be taken.