6.2　Bend Fabrication

6.2.1　Seamless pipe in wall thickness with positive tolerance should be used for fabrication of bend at site.

Method:measurements checking.

6.2.2　Minimum radius of bend shall comply with Table 6.2.2 of this code if no requirements are specified in design documents.

Method:measurements checking.

Table 6.2.2　Minimum radius of bend

Note:D0is outside diameter of pipe.

6.2.3　Fabrication of bend shall be cold bending or hot bending within allowable range of material characteristics.When heat treatment of bend is not specified in design documents，Table 7.4.4 of this Code shall be followed.

Method:in-process examination，and check heat treatment documents.

6.2.4　Quality of bend fabrication shall confirm to Article 5.4.6 of this code.

Method:visual examination and measurements checking.