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API 650 oil steel storage tanks construction


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API 650 oil steel storage tanks construction

API 650, API STD 650 Welded Tanks for Oil Storage, is the most widely used standard for global tank construction and procurement. API 650 tank is commonly used for oil, gasoline, diesel, chemical and production water storage.

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API 650, API STD 650 Welded Tanks for Oil Storage, is the most widely used standard for global tank construction and procurement. API 650 tank is commonly used for oil, gasoline, diesel, chemical and production water storage. API 650 tanks are located in refineries, docks, pipelines and production facilities throughout the United States. API 650 specifies the design, processing, welding, inspection and installation procedures for storage tanks.

The API Standard 650 is based on the accumulated knowledge and experience of Purchasers and Manufacturers of welded oil storage tanks of various sizes and capacities for internal pressures not more than 17.2 kPa (21/2 pounds per square inch) gauge. This Standard is meant to be a purchase specification to facilitate the manufacture and procurement of storage tanks for the petroleum industry.
 
Material for API Standard 650 tank
Materials used in the construction of API 650 oil steel storage tanks shall conform to the specifications listed in this section, subject to the modifications and limitations indicated in this standard. Material produced to specifications other than those listed in this section may be employed, provided that the material is certified to meet all of the requirements of an applicable material specification listed in this standard and the material’s use is approved by the Purchaser. The Manufacturer’s proposal shall identify the material specifications to be used. When this standard does not address material requirements for miscellaneous items and appurtenances, the Purchaser and/or the Manufacturer shall supply additional material requirements using a supplement to the Data Sheet.
 
Plate for API 650 tanks shells, roofs, and bottoms may be ordered on an edge-thickness basis or on a weight (kg/m2 [lb/ft2]) basis.
 
ASTM Specifications
Plates that conform to the following ASTM specifications are acceptable as long as the plates are within the stated limitations.
 
a)ASTM A36M/A36 for plates to a maximum thickness of 40 mm (1.5 in.). None of the specifications for the appurtenant materials listed in Table 1 of ASTM A36M/A36 are considered acceptable for tanks constructed under this standard unless it is expressly stated in this standard that the specifications are acceptable.

b)ASTM A131M/A131, Grade A, for plates to a maximum thickness of 13 mm (0.5 in.); Grade B for plates to a maximum thickness of 25 mm (1 in.); and Grade EH36 for plates to a maximum thickness of 45 mm (1.75 in.) (insert plates and flanges to a maximum thickness of 50 mm [2 in.]).

c)ASTM A283M/A283, Grade C, for plates to a maximum thickness of 25 mm (1 in.).
d)ASTM A285M/A285, Grade C, for plates to a maximum thickness of 25 mm (1 in.).
e)ASTM A516M Grades 380, 415, 450, 485/A516, Grades 55, 60, 65, and 70, for plates to a maximum thickness of 40 mm (1.5 in.) (insert plates and flanges to a maximum thickness of 100 mm [4 in.]).
f)ASTM A537M/A537, Class 1 and Class 2, for plates to a maximum thickness of 45 mm (1.75 in.) (insert plates to a maximum thickness of 100 mm [4 in.]).
g)ASTM A573M Grades 400, 450, 485/A573, Grades 58, 65, and 70, for plates to a maximum thickness of 40 mm (1.5 in.).
h)ASTM A633M/A633, Grades C and D, for plates to a maximum thickness of 45 mm (1.75 in.) (insert plates to a maximum thickness of 100 mm [4.0 in.]).
i)ASTM A662M/A662, Grades B and C, for plates to a maximum thickness of 40 mm (1.5 in.).
 
j)ASTM A678M/A678, Grade A, for plates to a maximum thickness of 40 mm (1.5 in.) (insert plates to a maximum thickness of 65 mm [2.5 in.]) and Grade B for plates to a maximum thickness of 45 mm (1.75 in.) (insert plates to a maximum thickness of 65 mm [2.5 in.]). Boron additions are not permitted.
k)ASTM A737M/A737, Grade B, for plates to a maximum thickness of 40 mm (1.5 in.).
l)ASTM A841M/A841 Grade A, Class 1 and Grade B, Class 2 for plates to a maximum thickness of 40 mm (1.5 in.) (insert plates to a maximum thickness of 65 mm [2.5 in.]).

Client demands
 

Customer's requirement configuration.

1. demand

Custom design
 

Field inspection design and design plan.

2. design

Processing & transportation

Initial customized processing and transportation.

3. Processing

On-site installation
 

On-site guidance for construction and installation.

4. installation
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