Difference between Low Pressure and High Pressure Boiler Pipes and Tubes

Factor	High pressure boiler	Low pressure boiler
MWAP (Maximum Allowable working pressure)	>15 psi	<15 psi
Use case	More in firetube boilers	Heating applications
Temperature	<2500F	250 - 12000F
Maintenance	Less	High
Water pressure	>260 psi	<260 psi
Similar size	higher output	Less output
Operating cost	high	low
Explosion risk	High (as higher pressure requires high maintenance)	Low (low pressure means less maintenance)
Steam rate	High	Low

Chosen model	Production of steam (kg/h)	Expected nominal output (kW)	OR nominal input (kW)	HPO nominal input (kW)	HP nominal input (kW)	Maximum working pressure (bar)	Level comprising water content (L)	Volume (L)	smoke side OR DP (mbar)	smoke side HPO DP (mbar)	smoke side HP DP (mbar)	Minimum length of burner head (mm)	Maximum diameter of burner head (mm)
300	300	204	226.7	221.7	217	12	540	730	2.2	2.9	3.7	340	210
400	400	273	303.3	296.7	290.4	12	540	730	2.6	3.4	4.2	340	210
500	500	341	378.9	370.7	362.8	12	820	1030	2.8	3.6	4.5	340	240
600	600	409	454.4	444.6	435.1	12	820	1030	3.5	4.3	5.1	340	240
800	800	560	622.2	608.7	595.7	12	1080	1500	3.8	4.4	5.1	380	240
1000	1000	700	777.8	760.9	744.7	12	1080	1500	4.2	5.0	5.8	380	240
1250	1250	852	946.7	926.1	906.4	12	1555	2195	4.5	5.2	5.9	400	280
1500	1500	1022	1135.6	1110.9	1087.2	12	1555	2195	5.1	5.9	6.7	400	280
1750	1750	1193	1325.6	1296.7	1269.1	12	2005	2810	5.5	6.1	6.7	420	280
2000	2000	1363	1514.4	1481.5	1450	12	2005	2810	6.0	6.8	7.6	420	280
2500	2500	1704	1893.3	1852.2	1812.8	12	2890	3950	6.8	7.2	7.6	420	360
3000	3000	2045	2272.2	2222.8	2175.5	12	2890	3950	7.0	7.8	8.6	420	360
3500	3500	2386	2651.1	2593.5	2538.3	12	3370	4600	7.3	8.1	9.0	450	360
4000	4000	2726	3028.9	2963.0	2900	12	4155	5780	8.0	8.8	9.6	450	400
5000	5000	3408	3786.7	3704.3	3625.5	12	5800	7730	8.6	9.6	10.4	450	400
6000	6000	4089	4543.3	4444.6	4350	12	6760	8600	8.8	10.0	11.2	450	420