@neutrium/pipe/src/ASTM_B88_Tube.ts

The pipe module of the Neutrium library

//
//	ASTM B88 Seamless Copper Water Tube
//

import { Pipe } from './Pipe'
import { Quantity } from '@neutrium/quantity';

export class ASTM_B88_Tube extends Pipe
{
	// Nominal diameter (inches) - Index used for other parameters
	static readonly NOMINAL_OD = [0.25,0.375,0.5,0.625,0.75,1,1.25,1.5,2,2.5,3,3.5,4,5,6,8,10,12];

	// Outer diameter (inches)
	static readonly OD_DATA = [0.375,0.5,0.625,0.75,0.875,1.125,1.375,1.625,2.125,2.625,3.125,3.625,4.125,5.125,6.125,8.125,10.125,12.125];

	// Wall thickness data (inches)
	static readonly WT_DATA = {
		"K" : [0.035,0.049,0.049,0.049,0.065,0.065,0.065,0.072,0.083,0.095,0.109,0.12,0.134,0.16,0.192,0.271,0.338,0.405],
		"L" : [0.030,0.035,0.04,0.042,0.045,0.05,0.055,0.06,0.07,0.08,0.09,0.1,0.11,0.125,0.14,0.2,0.25,0.28],
		"M" : [null,0.025,0.028,null,0.032,0.035,0.042,0.049,0.058,0.065,0.072,0.083,0.095,0.109,0.122,0.17,0.212,0.254]
	};

    public readonly type: string;
	public readonly nps: number;

    // @param {string} ns - The nominal size of the pipe (NPS vs DN ?)
    // @param {string} type - The ASTM B88 designation 'K', 'L' or 'M'
    constructor(size : string | Quantity, type : string)
    {
        let sizeQty = new Quantity(size),
			units = sizeQty.units() || "in",
            od = null,
			wt = null,
			nomSize : number = null,
			index : number = null;

		nomSize = +sizeQty.to("in").scalar.toFixed(3);

        // Get the DN size and outer diameter
        for (let i = 0, len = ASTM_B88_Tube.NOMINAL_OD.length; i < len; i++)
        {
            if(ASTM_B88_Tube.NOMINAL_OD[i] == nomSize)
            {
				index = i;
				break;
            }
        }

		if(index === null)
		{
			throw Error("Invalid nominal size provided");
		}

		if(!ASTM_B88_Tube.WT_DATA.hasOwnProperty(type))
		{
			throw Error("Invalid ASTM B88 type must be K, L or M");
		}

		od = new Quantity(ASTM_B88_Tube.OD_DATA[index] + "in").to(units);
		wt = ASTM_B88_Tube.WT_DATA[type][index];

		if(!wt)
		{
			throw Error("Invalid combination of nominal size and ASTM B88 type");
		}

		wt = new Quantity(wt + "in").to(units);

		// od and wt are in metres at this point
        super(od, wt);

        // Set additional type and nominal size
		this.type = type;
		this.nps = nomSize;
    }
}