// Steam Pipe Pressure Drop

function SteamPipePressureDrop(q,l,d,sd){
	this.q = q; 
	this.l= l;
	this.d = d;
	this.sd = sd;
}

SteamPipePressureDrop.prototype.pressureDrop = function(){
	var pd = 675300 * Math.pow(this.q,2) * this.l * (1 + 91.4/this.d) / (this.sd * Math.pow(this.d,5)); 
	return pd;
}

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