HPU_Replacement_Specifications 2019.pdf

Saint Lawrence Seaway Development Corporation

SECTION 35 05 40

HYDRAULIC POWER SYSTEMS FOR SLSDC

HYDRAULIC PIPE, HOSE AND FITTINGS

PART 1 GENERAL

1.1 SUMMARY –

Contractor shall use materials as specified in manufactures written instructions or as specified herein.

PART 2 PRODUCTS

2.1.11.1 Pipe

Use seamless stainless steel conforming to ASME B36.19M and ASTM A312/A312M, Grade TP304. The piping weight class must be Schedule 40 minimum.

2.1.11.2 Pipe Fittings

Use the socket welding type pipe fittings conforming to ASME B16.11 pressure class 3,000 pounds and made of stainless steel conforming to

ASTM A182/A182M, Grade F304. Conform flanges to ASTM A182/A182M with the grade suitable for the pipe to which attached. Also conform threaded fittings to the above, but use only where absolutely necessary for the application.

2.1.11.3 Pipe and Tube Hangers and Supports

Provide stainless steel pipe & tubing supports and hangers, where needed.

2.1.11.4 Unions

Provide O-ring type unions, made of stainless steel with socket-welding ends. The Supplier and/or manufacturer may at his option substitute Code

61 four bolt split flanges with O-rings for the unions.

2.1.11.5 Hydraulic Tubing

Stainless steel tubing used for hydraulic circuits must meet the applicable requirements of ASTM A269/A269M for Grade TP 304, Seamless.

Select the wall thickness to provide a safety factor of 6.0 based on the manufacturer's ratings for burst strength in relation to the maximum working pressure.

2.1.11.6 Tube Fittings

Provide flareless-type with SAE straight threads and Buna N O-ring seals.

Each fitting must hold the tubing with a chucking action; the fitting must provide a firm flat grip on the tubing without penetration of the tubing wall. Fittings must not twist the tubing during assembly.

Fittings must provide a leak-proof seal at the rated working pressure of the tubing. Each fitting connection must be capable of no less than 30 connect - disconnect - reconnect cycles without galling, leakage or any

Saint Lawrence Seaway Development Corporation

SECTION 35 05 40

other damage. Provide all tube fittings without special adaptors or custom-designed assemblies. All fittings must be Type 304 stainless steel.

2.1.11.7 Hose

Hose assemblies (consisting of flexible hose plus end fittings) shall not exceed 4.0-foot end to end length unless approved by the COR. Hose lengths shall be minimized to extent possible and appear neat and not kink or have sharp bends and must not rub, bind or ride over one another when routed to field connections.

Use flexible hoses only to facilitate field connection of the A & B lines to the circuits of the Fender Boom cylinder. Flexible hoses are not acceptable for other connections of the hydraulic machinery.

All hose assemblies shall be furnished with union connections at both ends to facilitate hose installation and alignment.

All flexible hose must have an inside diameter to match the line size to which it is to be connected. Provide hose conforming to SAE J517, 100R13.

The construction must be a synthetic rubber tube with four spiral wire reinforcements and a synthetic rubber cover.

Each end of the hose must have a straight split stainless steel flange fitting conforming to the requirements of the pipe, tube and/or valve interfaces previously defined.

Design fittings specifically for use with the hose selected and as recommended by the hose manufacturer. Install the fittings using the internal skive crimp method. Make fittings of stainless steel and the reusable type.

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