A.02 Product Description Hydraulic Cylinders.pdf

Product Description New Hydraulic Cylinders - Yaquina

01. General

Provide two (2) hopper door hydraulic cylinders, two (2) draghead hydraulic cylinders, and two (2) gantry hydraulic cylinders. The hydraulic cylinder rods shall be chromed and built to or comparable to the specifications in the drawings referenced.

02. References

Drawings: Draghead Cylinder Drawing #95342 Gantry Cylinder Drawing #95341

NORSHIPCO Y-2496-3 – Hydraulic Cylinders

Technical Standards: ASTM A325 (Standard Specification for Structural Bolts, Steel, Heat Treated

120/105 KSI Minimum Tensile Strength)

03. Submittals

Contractor shall submit drawings, operating specifications, and parts/seal list

04. Specifications

a. Hopper Door Cylinder

Provide two (2) hopper door hydraulic cylinder. The hydraulic cylinder rod shall be chromed and built to or comparable to the specifications in the drawing referenced (Y2496-3 – Hydraulic Cylinders). If the cylinder differs from the provided drawing, an updated drawing and operating specifications shall be submitted reflecting the changes. The cylinder shall be coated as per coating schedule in paragraph d. The piston seals shall be u-cup style, suitable for 10,000 psi service.

The cylinder shall be shop pressure tested to 3,000 psi. Cylinder shall be operated through full stroke, checked for leaks, and tested for leak-by of piston seals. COR shall be present for all testing.

b. Draghead Cylinder

Provide two (2) draghead hydraulic cylinder. The hydraulic cylinder rod shall be chromed. The drawing referenced for the draghead cylinder shall be used for dimensions for the cylinder and the photos (photo a, b, and c) of the physical cylinder shall be used for the design. The new cylinder shall have a round base on both ends rather than the square shown and there shall be no tie rods. The rest of the details for ports and dimensions shall remain the same. The COR shall verify the final cylinder. The cylinder shall be coated as per coating schedule in paragraph d. The piston seals shall be u-cup style.

The cylinder shall be shop pressure tested to 3,000 psi. Cylinder shall be operated through full stroke,

c. Gantry Cylinder

Provide two (2) gantry hydraulic cylinder. The hydraulic cylinder rod shall be chromed and built to or comparable to the specifications in the drawing referenced (Tomkins-Johnson Co. Drawing 95341). If the cylinder differs from the provided drawing, an updated drawing and operating specifications shall be submitted reflecting the changes. The cylinder shall be coated as per coating schedule in paragraph d. The piston seals shall be u-cup style.

The cylinder shall be shop pressure tested to 3,000 psi. Cylinder shall be operated through full stroke,

d. Coating Schedule

All hydraulic cylinders shall be painted according to coating schedule provided. All areas to be coated shall be cleaned / prepared to SSPC-SP3 or SSPC-SP6. Cleaned and prepared areas shall receive two (2) coats of epoxy primer, MIL SPEC MIL-PRF-32171B, Type I, Class 1, 4-6 mils DFT per coat and two (2) finish coats of acrylic polyurethane meeting MIL SPEC MIL-PRF-24667C, Types I, II, III & VIII to a thickness of 2-3 mils DFT per coat.

05. Testing

The new hopper door, draghead, and gantry hydraulic cylinders shall be shop pressure tested to 3,000 psi.

Cylinders shall be operated through full stroke, checked for leaks, and tested for leak-by of piston seals.

COR shall be present for all testing.