API RP 1004:2003 pdf download

API RP 1004:2003 pdf download.Bottom Loading and Vapor Recovery for MC 306 & DOT-406 Tank Motor Vehicles.
4 Bottom Loading forTank Motor Vehicles
4.1 ADAPTER USED FOR BO1TOM LOADING
4.1.1 Required Features
4.1.1,1 Type
To male with loading couplers, the tank vehicle adapter must have the basic configuration shown in Figure 1 tall to)erance’. are provided in the appropriate figure). In the open position, the adapter must have a clear, unobstrui.ted opening 2 in. (50.8 mm) in depth, measured from the outer face or closure of the salve as shown in Figure I. If a puppet device is used, the adapter poppet must have a travel of 2 in. (5ft8 mm). measured from the sealing surface, as shown in Figure I. The front face of the adapter puppet must be flat within 0.004 in. (0.102 mm). excluding the corner radius No fastening device shall protrude above the general plane of the adapter face.
If an interlock control is installed on the adapter. its dimensions must conform to those shown in Figure 2. Table I provides equivalent SI values (or the customary dimensions shown in Figures I and 2.
4.1.1.2 Actuation
The pnmars liquid control must be by means of the set stop meter on the loading island or a self-contained system on the tank vehicle. The coupler may he opened for loading by manual or automatic means,
4.1.1.3 Size ol Product Opening
The adapter must have a product opening 4 in. (101.6 mmi in diameter at the exposed outer face or closure of the valve.
4.1.1.4 Pressure Rating
The adapter must he ksigned for a working pressuit of 75 pound’. per square in. (psi) (517 kilopascals) and shall not leak at IS times working prcasure.
4.1.1.5 Mounting
The mounting must be accomplished by using a Truck Trailer Manutacturcis Association ITrMA) standard, lightweight. 8-hole. 4-in. (101.6 mm) flange.
4.2.1.4 Piping
The tank vehicle’s piping system including components between the loading adapter and any positive shutoff valve, must be designed for a working pressure of 75 psi (517 kilopascals) and must not leak at 1.5 times the working pressure. Any component that does not meet this requirement. such as lower rated gravity air eliminators, nonpressure manifolds, or meters, must be isolated from the bonoin-loaiing systems.
42.1.5 Venting
The vents installed on tank vehicles used for bottom loading must have sutlicicnt capacity to prevent damage to the vehicle tank from vapor pressure at the maximum loading rates when the tank is veined at atmospheric pressure. This may require supplementary venting in addition to the breathing vents.
4.2.1.6 LIquid Flow Control
The minimum requirements for control of liquid loading are a preset loading-island nieter with a set-stop valve for loading a predetermined quantity of liquid and an independent secondary shutoff control system to prevent overfill (see Section 5).
4.2.1.7 Equipment Safeguard
Provisions must he made on the tank vehicle to prevent the vehicle from being moved while any loading or vapor lines are connected.
4.2.2 Recommended Features
42.2.1 Deflector
When a tank is bottom loaded, the liquid should be eltectively controlled by a deflector that minimiics spraying, turbulence, and generation of static electricity (see API RP 2003).
5 Secondary Shutoff Control System
5.1 LIQUID FLOW CONTROL
The minimum requirements for liquid flow control are a primary set-stop or a two stage flow control valve (hereafter referred to as a “primary shutoff control” valve or PSC valve) and an independent secondary shutoff system (hereafter relerred to as a “secondary shutoff control” or SSC) (see 4.2.1.6).