(a) The casing shall provide structural stability to prevent casing collapse during installation as well as drill hole wall integrity when installed, be of required size to convey liquid at a specified injection/recovery rate and pressure, and be of required size to allow for sampling. - (i) Steel casing shall meet the following conditions:
- (A) Standard and line pipe. This material shall meet one of the following specifications:
- (I) API Std. 5L, "Specifications for Line Pipe."
- (II) API Std. 5LX, "Specifications for High-Test Line Pipe."
- (III) ASTM A53 "Standard Specification for Pipe Steel, Black and Hot Dipped, Zinc Coated Welded and Seamless."
- (IV) ASTM A120 "Standard Specifications for Pipe, Steel, Black and Hot-Dipped Zinc-Coated (Galvanized) Welded and Seamless, for Ordinary Uses."
- (V) ASTM A134 "Standards Specifications for Electric-Fusion (arc) - Welded Steel Plate Pipe (Sizes 16 inches and over)."
- (VI) ASTM A135 "Standard Specifications for Electric -Resistance - Welded Steel Pipe."
- (VII) ASTM A139 "Standard Specification for Electric-Fusion (arc) - Welded Steel Pipe (Sizes 4 inches and over)."
- (VIII) ASTM A211 "Standard Specifications for Spiral - Welded Steel or Iron Pipe."
- (IX) AWWA C200 "AWWA Standard for Steel Water Pipe 6 inches and Larger."
- (B) Structural steel. This material shall meet one of the following specifications:
- (I) ASTM A36 "Standard Specification for Structural Steel."
- (II) ASTM A242 "Standard Specifications for High Strength Low Alloy Structural Steel."
- (III) ASTM A283 "Standard Specification for Low and Intermediate Tensile Strength Carbon Steel Plates, Shapes and Bars of Structural Quality."
- (IV) ASTM A441 "Tentative Specifications for High-Strength Low Alloy Structural Manganese Vanadium Steel."
- (V) ASTM A570 "Standard Specification for Hot-Rolled Carbon Steel Sheet and Strip, Structural Quality."
- (C) High Strength Carbon steel sheets or "well casing steel." Each sheet of material shall contain mill markings that identify the manufacturer and specify that the material is well casing steel that complies with the chemical and physical properties published by the manufacturer.
- (D) Stainless Steel casing shall meet the provisions of ASTM A409 "Standard Specification for Welded Large Diameter Austenitic Steel Pipe for Corrosive or High Temperature Service."
- (ii) Plastic can also be used for casing in many locations and under a variety of circumstances. The two groups of plastic materials available are thermoplastics and thermosets.
- (A) Thermoplastics. This material shall meet the requirements of ASTM F 480 "Standard Specification for Thermoplastic Water Well Casing Pipe and Couplings made in Standard Dimension Ratios (SDR)."
- (B) Thermosets. This material shall meet the requirements of the following specifications:
- (I) ASTM D2996 "Standard Specification for Filament Wound Reinforced Thermosetting Resin Pipe."
- (II) ASTM D2997 "Standard Specification for Centrifugally Cast Reinforced Thermosetting Resin Pipe."
- (III) ASTM D3517 "Standard Specification for Reinforced Plastic Mortar Pressure Pipe."
- (IV) AWWA C950 "AWWA Standards for Glass - Fiber -Reinforced Thermosetting - Resin Pressure Pipe."
- (iii) Concrete pipe used for casing should conform to the following specifications:
- (A) ASTM C14 "Standard Specifications for Concrete Sewer, Storm Drain, and Culvert Pipe."
- (B) ASTM C76 "Standard Specification for Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe."
- (C) AWWA C300 "AWWA Standards for Reinforced Concrete Pressure Pipe, Steel Cylinder Type, for Water and Other Liquids."
- (D) AWWA C301 "AWWA Standards for Prestressed Concrete Pressure Pipe, Steel Cylinder Type, for Water and Other Liquids."
- (iv) Galvanized sheet metal pipe or natural wood shall not be used as casing.
(b) All casing shall be placed with sufficient care to avoid damage to casing sections and joints. All joints in the casing above the perforations or screens shall be watertight. The uppermost perforations shall be at least below the minimum depth of seal. Casing shall be equipped with centering guides to ensure even thickness of annular seal and/or gravel pack. - (i) Metallic casing. Steel casing may be joined by either welding or by threading and coupling.
- (ii) Plastic (non-metallic) casing. Depending on the type of material and its fabrication, plastic casing may be joined by solvent welding or may be mechanically joined. Compatibility between potential contaminants and the sealing agent used shall be demonstrated.
020-26 Wyo. Code R. § 26-8