Flange joints gaskets shall be of the inside bolt circle type, unless specified otherwise, and shall com- ply with DIN 19565.  Other types of gaskets may be used with the prior approval of the Engineer  The specification for steel pipes is given in the herewith Employer’s Requirements, Section 7: Me- chanical Works.  Any vehicle on which pipes are to be transported shall have a body of such length that the pipes do not  overhang. The pipes shall be handled in accordance with the manufacturer's recommendations. Ap- proved slings shall be used and all hooks and dogs and other metal devices shall be padded. Hooks  engaged on the inner wall surface at pipe ends shall not be used. Pipe handling equipment shall be  maintained in good repair and any equipment that in the opinion of the Engineer may cause damage to  the pipes shall be discarded.  Under no circumstances shall pipes be dropped, be allowed to strike on another, be rolled freely, or  dragged along the ground.  All pipes shall be stored in accordance with the manufacturer's recommendations, in order to preserve  their quality and condition to the standards set out in the specification. Particular care shall be taken in  respect to HDPE, PVC and GRP pipes, e.g. PVC-pipes shall not be exposed to direct sunshine.  Pipes and fittings shall be stored raised from the ground and shall be carefully supported cushioned  and wedged. Pipes shall not rest directly on one another and shall not be stacked more than four pipes  high, or two pipes high in the case of pipes greater than DN 500. Couplings and joints (and all compo- nents thereof) and other similar items shall be stored in dry conditions, raised from the ground in sheds  or covered areas.  Storage areas shall be carefully set out to facilitate unloading, loading and checking of materials with  different consignments stacked or stored separately with identifications marks clearly visible.  Corrugated pipes should be stored in enclosed areas with a shed, if possible, without direct sunlight. It  should be avoided from storing for a long time in completely closed and hot. Should be free from cut- ting materials such as Wooden wedges or similar tools which will not damage the pipe on the floor  should be placed and the pipes should be piled up. Care should be taken that no burden is placed on  the muffs. Since the raw material from which corrugated pipes are produced is combustible, necessary  precautions should be taken.  Before a new pipe or fitting is added to the pipeline, each piece shall be brushed out and carefully ex- amined for soundness. Damaged pipes, with in the opinion of the Engineer cannot be satisfactorily  repaired, shall be rejected and removed from the site.  If the Engineer considers that an unacceptable proportion of the pipes within a test length have failed,  the Contractor may be required to test hydraulically, to the site test pressure each pipe and joint before  pipe lying. In this event, test results shall be submitted to and approved by the Engineer before any  further pipes are laid. The cost of individual pipe testing shall be borne by the Contractor.  The Engineer shall inspect all joints and no trench above joints, for whatever type of joint, shall be  filled in until the Engineer shall so direct.  5.3.8 Inspection of Pipes and Fittings  5.3.7 Storage of Pipes  5.3.6 Transportation of Pipes  5.3.5.9 Steel pipes  22 of 49 5_Vol3_d4.3_Section 5 Earth and pipe works_en_GIR_rev6.docx  Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 05: Earth Works, Pipe Works and Ground Improvement 