The S-type steam heater (heat dissipation pipe) is a standard model of heat dissipation pipe, suitable for steam heating systems. As its inlet and outlet joints are located on both sides of the pipe, curved pipes are used to eliminate stress caused by thermal expansion and other reasons.
The finned tubes are made by winding a 10 × 0.2mm corrugated copper strip around a Φ 16 × 1mm copper tube, forming a spiral shape with three different pitch sizes of 3.2mm - "R", 4.2mm - "M", and 6.5mm - "T". The "R" pitch has a small pitch and a large heat dissipation area due to its large heat dissipation capacity; The "M" type has a larger spacing, resulting in lower heat dissipation and air resistance; The "T" spacing is large and suitable for situations where steam pressure is high but air temperature rise is low.
The S-type steam heater has various combinations of different surface tube lengths, tube numbers, row numbers, and fin spacing, with a total of 765 sizes and specifications.
After the winding of the finned tube is completed, the surface is dipped in tin alloy to ensure a tight contact between the fins and the tube, and to achieve a beautiful and corrosion-resistant effect.
The connection between the finned tube and the intake and return main pipe is made by brazing, and other process details are strictly required to ensure good performance, durability, easy installation, and cost-effectiveness of the radiator.

Model - number of rows (spacing code) - number of surface tubes - length of surface tubes (inches).
If two rows are used, with a spacing of 3.2mm, 21 surface tubes, and a tube length of 60 inches, then it is S-2 (R) -21-60.

Number of surface tubes	B (mm)	Basic parameters/ Row number/A (mm)/ Surface tube length			24	30	36	42	48	54	60	66	72	78	84	90	96	102	108	114	120
					830	980	1130	1280	1430	1580	1730	1880	2030	2180	2330	2480	2630	2780	2930	3080	3230
12	530	Heat dissipation area(m²) Wind area(m²) Ventilation net cross-sectional area (m²) Inlet and outlet pipe joint (inch) Inlet and outlet pipe joint (inch) Net weight (KG) Net weight (KG)		2 1 or 2 1 or 2 1 2 1 2	9 0.26 0.144 2 2 29.1 37	11.25 0.325 0.18 2 2 32.8 42.5	13.5 0.39 0.216 2 2 36.5 48	5.75 0.455 0.252 2 2 40.2 53.5	18 0.52 0.288 2 2 43.9 59	20.25 0.585 0.324 2 2 47.6 64.5	22.5 0.65 0.36 2 2 51.3 70	24.75 0.715 0.396 2 5/2 55 75.5	27 0.78 0.432 2 5/2 58.7 81.1	29.25 0.845 0.468 2 5/2 62.4 86.5	31.5 0.91 0.504 2 5/2 66.01 92	33.75 0.975 0.54 2 5/2 69.8 97.5	36 1.04 0.576 2 5/2 73.5 103	38.25 1.105 0.612 2 5/2 77.5 108.5	40.5 1.17 0.648 5/2 5/2 80.9 114	42.75 1.235 0.648 5/2 5/2 84.6 119.5	45 1.3 0.72 5/2 5/2 88.3 125
15	636	Heat dissipation area(m²) Wind area(m²) Ventilation net cross-sectional area (m²) Inlet and outlet pipe joint (inch) Inlet and outlet pipe joint (inch) Net weight (KG) Net weight (KG)		2 1 or 2 1 or 2 1 2 1 2	11.25 0.325 0.18 2 2 34 43	14.06 0.406 0.225 2 2 38.3 50	16.88 0.488 0.27 2 2 42.6 57	19.68 0.569 0.315 2 2 46.9 64	22.5 0.65 0.36 2 2 51.2 71	25.31 0.731 0.405 2 2 55.5 78	28.13 0.812 0.45 2 2 59.8 85	30.94 0.894 0.495 2 5/2 64.1 92	33.75 0.975 0.54 2 5/2 68.4 99	36.56 1.056 0.585 2 5/2 72.7 106	39.38 1.137 0.63 2 5/2 77 113	42.19 1.219 0.675 5/2 5/2 81.3 120	45 1.3 0.72 5/2 5/2 85.6 127	47.81 1.381 0.765 5/2 5/2 89.9 134	50.63 1.462 0.81 5/2 5/2 94.2 141	53.44 1.544 0.855 5/2 5/2 98.5 148	56.25 1.625 0.9 5/2 5/2 102.8 155
18	742	Heat dissipation area(m²) Wind area(m²) Ventilation net cross-sectional area (m²) Inlet and outlet pipe joint (inch) Inlet and outlet pipe joint (inch) Net weight (KG) Net weight (KG)		2 1 or 2 1 or 2 1 2 1 2	13.5 0.39 0.216 2 2 39 50	16.88 0.488 0.27 2 2 44 57.8	20.25 0.586 0.324 2 2 49 65.6	23.63 0.684 0.378 2 2 54 73.4	27 0.782 0.432 2 5/2 59 81.2	30.38 0.88 0.486 2 5/2 64 89	33.75 0.978 0.54 2 5/2 69 96.8	37.13 1.076 0.594 2 5/2 74 104.6	40.5 1.174 0.648 5/2 5/2 79 112.4	43.88 1.272 0.702 5/2 5/2 84 120.2	47.25 1.37 0.756 5/2 5/2 89 128	50.63 1.068 0.81 5/2 5/2 94 135.8	54 1.566 0.864 5/2 5/2 99 143.6	57.38 1.664 0.918 5/2 5/2 104 151.4	60.75 1.762 0.972 5/2 5/2 109 159.2	64.13 1.86 1.026 5/2 5/2 114 167	67.5 1.958 1.08 5/2 5/2 119 174.8
21	843	Heat dissipation area(m²) Wind area(m²) Ventilation net cross-sectional area (m²) Inlet and outlet pipe joint (inch) Inlet and outlet pipe joint (inch) Net weight (KG) Net weight (KG)		2 1 or 2 1 or 2 1 2 1 2	15.75 0.455 0.252 5/2 5/2 43 57	19.69 0.568 0.315 5/2 5/2 48.5 66	23.63 0.681 0.378 5/2 5/2 54 75	27.56 0.794 0.441 5/2 5/2 59.5 84	31.5 0.907 0.504 5/2 5/2 65 93	35.44 1.02 0.567 5/2 5/2 70.5 102	39.38 1.133 0.63 5/2 5/2 76 111.0	43.31 1.246 0.693 5/2 5/2 81.5 120	47.35 1.359 0.756 5/2 5/2 87 129	51.29 1.472 0.819 5/2 5/2 92.5 138	55.13 1.585 0.882 5/2 5/2 98 147	59.06 1.698 0.945 5/2 5/2 103.5 156	63 1.811 1.008 5/2 5/2 109 165	66.94 1.924 1.071 5/2 5/2 14.5 174	70.88 2.037 1.134 5/2 5/2 120 183	74.81 2.15 1.197 5/2 5/2 25.5 192	78.75 2.263 1.26 5/2 5/2 131 201
24	954	Heat dissipation area(m²) Wind area(m²) Ventilation net cross-sectional area (m²) Inlet and outlet pipe joint (inch) Inlet and outlet pipe joint (inch) Net weight (KG) Net weight (KG)		2 1 or 2 1 or 2 1 2 1 2	18 0.52 0.288 5/2 5/2 50 64	22.5 0.65 0.36 5/2 5/2 56 74	27 0.78 0.432 5/2 5/2 62 84	31.5 0.91 0.504 5/2 5/2 68 94	36 1.04 0.576 5/2 5/2 74 104	40.5 1.17 0.648 5/2 5/2 80 114	45 1.3 0.72 5/2 5/2 86 124	49.5 1.43 0.792 5/2 5/2 92 134	54 1.56 0.864 5/2 5/2 98 144	58.5 1.69 0.936 5/2 5/2 104 154	63 1.83 1.008 5/2 5/2 110 164	67.5 1.95 1.08 5/2 5/2 116 174	72 2.08 1.152 5/2 5/2 122 184	76.5 2.21 1.224 5/2 5/2 128 194	81 2.34 1.296 5/2 5/2 134 204	85.5 2.47 1.368 5/2 5/2 140 214	90 2.6 1.44 5/2 5/2 146 224