aluminum sheet Alclad 3004 API Std 650 low-alloy steel tanks

In this project, an elemental area of API 620 oil storage tank wall is constructed of ASTM A516 Grade 55 steel plate subjected to a meridional unit force, T1, of 2620 lbf/in. tension and a latitudinal unit force, T2, of 2880 lbf/in. compression. The meridional radius of curvature, R1, is 132 in., and the length of the normal from the surface to the axis of revolution, R2, is 409 in. The joints in the wall are spot-radiographed, double-welded butt joints, and no corrosion allowance is required.
The problem in this example is to graphically find the minimum thickness of tank wall required for the given conditions (see API 620 tank standard 5.10.3.3).
Solution: As determined from Table 5-1, the maximum, allowable tensile stress value, Sts, for ASTM A516 Grade 55 steel plate in simple tension is 16,500 lbf/in.2. Since the compressive stress is latitudinal, the governing value of R for this situation is R1, or 132 in.

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 low-alloy steel tanks roof plates; to nozzles and manholes; and to all exposed surfaces of internal structural members and non-removable internals.

3500 tons SA387GR5CL1 steel plate to make pressure vessel equipment in Pakistan. The main business of our this client from Pakistan is manufacturing Columns&Towers, Heat Exchanger,Waste Heat Recovery Boiler, Pressure Vessel&Reactors,Tanks, Metering Skid. And we supply API Std 650 low-alloy steel tanks the Mill Certificate, Shipping picture, the marking of steel plate and we help client to do SGS inspection.

Strictly control the welding groove forming of API Std 650 low-alloy steel tanks: in order to ensure the geometric dimension of assembly and good welding of welding seam, before hoisting and laying, the edge of all metal vertical storage tank plate shall be polished by grinder, and the flatness of plate shall be ensured according to the design requirements. Strictly control the size of API Std 650 low-alloy steel tanks weld assembly: measures must be taken to strictly control the assembly size of metal vertical tank bottom plate during assembly.

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