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 

## 5.3.5.9 Steel pipes 

The specification for steel pipes is given in the herewith Employer’s Requirements, Section 7: Me- chanical Works. 

## 5.3.6 Transportation of Pipes 

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. 

## 5.3.7 Storage of Pipes 

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. 

## 5.3.8 Inspection of Pipes and Fittings 

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. 

