Section 01015 - Page 13

4.2 DESIGN CRITERIA

The Codes, Standards, and Regulations listed in these documents shall be used in the construction of this project. The publications shall be per the 2009 IBC and Chapter 35 Referenced Standards or the most recent editions unless noted otherwise. Standards other than those mentioned may be accepted provided they meet the minimum requirements and the Contractor shall submit proof of equivalency to the Contracting Officer for approval.

5.0 PROPANE STORAGE & DISTRIBUTION

5.1 GENERAL

a. The design and installation of equipment, materials and work covered under the 50,000L PROPANE STORAGE AREA shall conform to the following standards, codes and regulations where applicable except where otherwise indicated under particular clause(s). The publications to be taken into consideration shall be those of the most recent editions. Standards other than those mentioned herein may be accepted provided that the standards chosen are internationally recognized and meet the minimum requirements of the specified standards. The Contractor shall submit proof of equivalency if requested by the Contracting Officer.

b. The Contractor shall submit the following for the equipment to be provided under this section of the specification: manufacturer’s data including performance characteristics at design conditions; catalog cuts showing dimensions, performance data, electrical requirements, compliance with standards as stated in paragraph CODES, STANDARDS AND REGULATIONS; drawings indicating location and installation details.

5.2 STORAGE TANK

a. Purchased Vessels (Propane Storage Tanks) shall meet the requirements of ASME Boiler and Pressure Vessel Code, Section VIII, Division 1 or 2. The design pressure of LPG vessels shall not be less than the vapor pressure of the stored product at the maximum product design temperature. The additional pressure resulting from the partial pressure of noncondenable gases in the vapor space and the hydrostatic head of the product at maximum fill shall be considered. Both a minimum design temperature and maximum design temperature shall be specified. In determining a maximum design temperature, consideration shall be give to factors such as ambient temperature, solar input, and product run down temperature. In determining a minimum design temperature, consideration shall be give to the factors noted in the preceding sentence as well as the auto refrigeration temperature of the stored product when it flashes to atmospheric pressure. LPG vessel design shall consider vacuum effects and be designed accordingly. Low-melting-point materials of construction, such as aluminum and brass, shall not be used for LPG vessels.

b. Equipment shall be suitable for use with LPG and designed for at least the maximum service conditions to which it may be subjected. Each LPG tank shall be provided with liquid-level gauging equipment as described shown below:

1. An independent high-level alarm shall be provided. The alarm shall be set to give the operator sufficient time to stop the flow before the maximum permissible filling height is exceeded. The alarm shall be located so that it is audible and visible to the operating personnel controlling the filling operation. The maximum permissible filling height of an LPG tank shall be set to provide adequate vapor space to accommodate any thermal expansion that may occur after filling is completed. The maximum filling height shall be set so that when a tank is filled to the level of the minimum anticipated storage temperature the thermal expression of the liquid will not cause the LPG level to exceed 98% of the liquid full level.

2. Level Gauges. Columnar glass level gauges shall not be used. Reflex and see-through level gauges shall be equipped with a ball check valve or a similar protective device.

W912DQ-13-R-4034