@neutrium/pipe/src/ASTM_B88M_Tube.ts

The pipe module of the Neutrium library

//
//	ASTM B88M Seamless Copper Water Tube (Metric)
//

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

export class ASTM_B88M_Tube extends Pipe
{
	// Nominal diameter (mm) - Index used for other parameters, nominal size and OD are the same
	static readonly OD_DATA = [6,8,10,12,15,18,22,28,35,42,54,67,79,105,130,156,206,257,308];

	// Wall thickness data (inches)
	static readonly WT_DATA = {
		"A" : [0.8,0.9,0.9,1.2,1.2,1.2,1.6,1.6,1.6,1.8,2.1,2.4,2.8,3.4,4,4.8,6.8,8.5,10.3],
		"B" : [0.7,0.8,0.8,0.9,1,1,1.1,1.2,1.4,1.5,1.7,2,2.3,2.8,3.1,3.5,5,6.3,7.1],
		"C" : [0.6,0.6,0.6,0.6,0.7,0.7,0.8,0.9,1.1,1.2,1.5,1.6,1.8,2.4,2.7,3.1,4.3,5.4,6.4]
	};

    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() || "mm",
            od = null,
			wt = null,
			nomSize : number = null,
			index : number = null;

		nomSize = +sizeQty.to("mm").scalar.toFixed(0);

        // Get the DN size and outer diameter
        for (let i = 0, len = ASTM_B88M_Tube.OD_DATA.length; i < len; i++)
        {
            if(ASTM_B88M_Tube.OD_DATA[i] == nomSize)
            {
				index = i;
				break;
            }
        }

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

		if(!ASTM_B88M_Tube.WT_DATA.hasOwnProperty(type))
		{
			throw Error("Invalid ASTM B88M type must be A, B or C");
		}

		od = new Quantity(ASTM_B88M_Tube.OD_DATA[index] + "mm").to(units);
		wt = ASTM_B88M_Tube.WT_DATA[type][index];

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

		wt = new Quantity(wt + "mm").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;
    }
}