API Std 650 self-anchored flat-bottom tanks carbon steel anchor straps

Charpy V-notch specimens shall be taken from the weld metal and from the heat-affected zone of the welding procedure qualification test plates or from duplicate test plates.
Weld metal impact specimens shall be taken across the weld with the notch in the API 620 oil tank material weld metal. The specimen shall be oriented so that the notch is normal to the surface of the material. One face of the specimen shall be substantially parallel to and within 1/16 in. of the surface.

Corrosion allowance, if specified, shall be added to calculated API 650 tanks shell and self-supporting roof thicknesses; to minimum nominal thicknesses of bottom and supported API Std 650 self-anchored flat-bottom tanks roof plates; to nozzles and manholes; and to all exposed surfaces of internal structural members and non-removable internals.

In April 2018, our Philiphine customer purchased 1008 Tons API5L Gr.B ERW&Q345B SMLS pipe for offshore oil field resources drilling project. This is a regular demand almost two month, and we has been cooperated more than three times, totally around 2100 tons steel pipe since 2015 year.

Weld inspection of API Std 650 self-anchored flat-bottom tanks, vertical oil tank wall plate: In the welding inspection process of oil tank wall plate, attention should be paid to the defects of thick wall plate, such as incomplete penetration, incomplete root fusion and cracks. If there is a root incomplete penetration defect, it is necessary to open the weld joint with carbon arc air gouging and grinding machine grinding, or even weld through, and then weld again after the defect is removed.

Our company will accept the product quality objection registration record, pass it to the API Std 650 self-anchored flat-bottom tanks production unit and relevant departments, and timely coordinate the supervision of product API Std 650 self-anchored flat-bottom tanks quality objection. Our company coordinates the relevant department personnel to the customer unit to carry on the investigation, the processing.