1、I INCH-POUND I b e * COMMERCIAL ITEM DESCRIPTION A-A- 50544 September 30. 1993 SUPERSEDING 20 July 1983 MIL-H-18551C RADIATORS, HEATING, STEAM AND HOT WATER, CAST IRON This Commercial Item Description (CID) is approved by the Commissioner, Federal Supply Service, General Services Administration, for
2、 the use of all Federal agencies. 1, Abstract. This CID covers small tube, cast-iron radiators used in steam or hot-water heating systems. residential and public buildings. pounds per square inch gage (psig) (103.42 kilopascals (kPa) (gage) and low temperature water heating systems. The radiators ar
3、e intended for the heating of The radiators can be used with steam up to 15 Radiator types are as follows: Type I - Leg-mounted Type II - Wall-mounted 2. Salient characteristics. 2.1 Description. The cast-iron steam and hot water heating radiators (referred to herein as “radiators“) shall consist of
4、 an assembly of small tube cast-iron sections connected by tie rods at the top and bottom, and shall include the tappings, nipples, and fittings. The height of the radiator shall be 19 or 25 inches (462.60 to 635.00 millimeters (mm) with four tubes per section, or 25 inches (635.00 mm) with six tube
5、s per section, as specified (see 6.1). The number of sections for all radiators shall be an even-numbered amount from 2 to 56, as specified (see 6.1 and 6.4). 2.2 Desien. The radiators will be designed to withstand, without deformation, leakage or damage, a minimum hydrostatic test pressure of 100 p
6、cig (689.47 kPa (gage) 1. Beneficial comments (recommendations, additions, deletions) and any pertinent1 data which may be of use in improving this document should be addressed to: I Commanding Officer (Code 156), Naval Construction Battalion Center, I 1000 23rd Avenue. Port Hueneme. CA 93043-4301.
7、I FSC 4520 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-50544 = 9999974 0355879 822 A-A- 50544 2.3 Construction. 2.3.1 Mounting. Standard legs for type I radiato
8、rs shall be 2-1/2 inches (63.50 mm) high measured from the floor to the centerline of the bottom tapping. When specified (see 6.1), legs shall be 4-1/2 inches (114.30 mm) high. Legs shall be integral with end sections. Radiators having 30 sections or more shall have a center-legged section. Type II
9、radiators shall be furnished with two wall-mounting bracket assemblies, except that type II radiators with 30 or more sections shall be furnished with three wall-mounting bracket assemblies. 2.3.2 Connections. Radiator sections shall be assembled with malleable-iron or teflon-coated steel push nippl
10、es. Connections shall be provided at both the top and bottom of each section. be as specified (see 6.1). Location of steam and hot water supply inlet shall 2.3.3 TauDings. Each end section shall be furnished with a 1-inch (25.40 mm) or l-l/4-inch (31.75 mm) top tapping and a 1-1/4- or l-1/2-inch (31
11、.75 or 38.10 mm) bottom tapping. Vent tappings not less than 1/8 inch (3.18 mm) nominal pipe size (NPS) shall be furnished on the end section opposite the supply section. 2.3.4 Fittings. When specified (see 6.1), tappings shall be bushed. Bushings shall be of the outside hexagon type. may be furnish
12、ed unless the eccentric bushing is definitely specified (see 6.1). Bushings shall reduce the tappings to the NPS specified, and shall be installed in the top or bottom tappings, supply or return end, as specified (see 6.1). All other tappings shall be plugged with standard radiator plugs. Either con
13、centric or eccentric bushings 2.3.5 Pedestals. When specified (see 6.1), radiator pedestals for each leg shall be furnished. The pedestals shall be 1/2, 1, 1-1/2 or 2 inches (12.70, 25.40, 38.10 or 50.80 mm) in height as specified (see 6.1). 2.4 Commercial manual. When specified (see 6.1), a commerc
14、ial off-the-shelf manual with parts list shall be provided for each cast-iron radiator. 3. Remilaton reauirements. The offerer/contractor is encouraged to use recovered materials in accordance with Public Law 94-580 to the maximum extent practical. 4. Quality assurance. 4.1 Contractor certification.
15、 The contractor shall certify and maintain substantiating evidence that the product offered meets the salient characteristics of this CID and that the product conforms to the producers own drawings, specifications, standards, and quality assurance practices. The Government reserves the right to requ
16、ire proof of such conformance prior to first delivery and thereafter as may be otherwise provided for under the provisions of the contract. 4.2 Metric DrOdUCtS. Products manufactured to metric dimensions will be considered on an equal basis with those manufactured using inch-pound units, provided th
17、ey fall within tolerances specified using conversion tables contained in the latest revision of FED-STD-376, and all other requirements of this document are met. If a product is manufactured to metric dimensions and those - I 2 I Provided by IHSNot for ResaleNo reproduction or networking permitted w
18、ithout license from IHS-,-,-A-A-5054Y m 9999974 OL558O 544 A-A-50544 I I I I I I I I II Height (see 2. i) 1 Type (I or 11) (see 1) I a 4 dimensions exceed the tolerances specified in the inch-pound units, a request should be made to the specification preparing activity for changes to this document.
19、5. Packaging. Unless otherwise specified in the contract or order (see 6.1), the preservation, packing, and marking shall be in accordance with ASTM D3951. 6. Notes. 6.1 Orderina data. Acquisition documents should specify the following: a. b. C. d. e. f. h. i. Title, number, and date of this CID. Ty
20、pe of radiator required (see i). Height of radiator, number of tubes per section, and number of sections required (see 2.1). When 4-1/2-inch (114.30 mm) legs are required on type I radiators (see 2.3.1). Whether supply inlet is located on right or left side of the radiator (see 2.3.2). When bushings
21、 are required; when eccentric bushings are definitely required; and size and location of the bushings (see 2.3.4). When leg pedestals for type I radiators are required; and the height of the pedestals (see 2.3.5). When commercial manual shall be provided (see 2.4). When preservation, packaging, pack
22、ing, and marking is to be other than as specified (see 5). 6.2 Source of documents. available from Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094. Copies of Federal and military documents are 6.3 Source for non-Government association documents. AST
23、M D3951 is available from ASTM, 1916 Race Street, Philadelphia, PA 19103. 6.4 CID-based Dart identification numbers. The following part identification numbering procedure is for Government purposes and does not constitute a requirement for the contractor. A - 50544 - X - XX - X - XX I II l I- Even-n
24、umbered sections (see 2.1) II I I I II I I II Supply inlet location (see 2.3.2) CID number - I I I I Designates a CID 6.5 Radiator rating and dimensions. The equivalent direct radiation (EDR) for the specified height and number of tubes and sections should be as given in table I. The EDR rating shal
25、l be based on the emission of 240 British thermal 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A- 50544 units per hour (13tu/hr) per square foot of EDR with steam at 215 degrees Fahrenheit (OF), while the radiator stands free in an ambient roo
26、m temperature of 70F. shall be not les:; that the applicable value of the EDR multiplied by 240 for 215OF steam or by 150 for 170F steam or by 150 for 170F water. Table I is provided forainformation in its simplest form and is not metricized. Under these conditions, the total Btu/hr heat emission of
27、 the radiator TABLE I. Radiator ratings and dimensions. (Heat emission - based on 240 Btu (steam) per square foot per hour) I i Four - tube I S ix - tube i I I I I I I I I I I inches1 I I I 1 I 19-in.height I 25-in.height I 25-in.height I 32-in.height I I Number of1 Length1 1.6 sq. ft. I 2.0 sq. ft.
28、 I 3.0 sq. ft. I 3.7 sq. ft. I I sections I 1-3/14 I per section I per section I per section I per section I I I per 10.914 sq. ft. I 1.143 sq. ft.1 1.714 sq. ft.1 2.114 sq. ft.1 I Isectionlper lineal in.lper lineal in.lper lineal in.Iper lineal in.1 IL I I I I I I I I I I I I I I I I I I I I I I I
29、I I I I I I I I I I I 21 41 61 81 10 I 12 I 14 I 16 I 18 I 20 I 22 I 24 I 26 I 28 I 30 I 32 I 34 I 36 I 38 . I 40 I 42 I 44 I 46 I 48 I 50 I 52 I 54 I I 35 I 7.0 I 10.5 I 21.0 I 14.0 I 17.5 I 24.5 I 28.0 I 31.5 I 35.0 I 38.5 I 42.0 I 45.5 I 49.0 I 52.5 I 56.0 I 63.0 I 66.5 I 70.0 I 59.5 I 73.5 I 77.
30、0 I 80.5 I 84.0 I 87.5 I 91.0 I 94.5 I 3.2 6.4 9.6 12.8 16.0 19.2 22.4 25.6 28.8 32.0 35.2 38.4 41.6 44.8 48.0 51.2 54.4 57.6 60.8 64.0 67.2 70.4 73.6 76.8 80.0 83.2 86.4 I I I I I I l I I I I I I I l I I I I I I I I I I I I I 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80 84 88 92 96 100
31、 104 108 I I I I I I I I I I I I I I I I l I I I I I I I I I I I 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 120 126 132 138 144 150 156 162 I I I I I I I I I I I I I I I I I I I I I I I I I I I I 56 I 98.0 I 89.6 I 112 I 168 I 7.4 14.8 22.2 29.6 37.0 44.4 51.8 59.2 66.6 74.0 1 81.4 1
32、 88.8 1 96.2 1 103.6 1 111. o 1 118.4 1 125.8 1 133.2 1 140.6 1 148. O 1 155.4 1 162.8 1 170.2 1 177.6 1 185. O 1 192.4 1 199.8 1 207.2 1 I I- l I i & I 1 Note 1: Heat emissions for various average hot water temperatures. Av. water temp. in radiator 220 215 210 200 190 180 170 160 150 Heat emission
33、Btu per sq. ft. 250 240 230 210 190 170 150 130 110 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-505q4 9999974 0355882 337 A-A-50544 Note 2: 6.6 SuDersession data. This CID replaces military specification MIL-H-18551C dated 20 July 1983. Add
34、 1/2 inch (12.70 mm) to length for each bushing. c MILITARY INTERESTS: v CIVIL AGENCY COORDINATING ACTIVITY: GSA - FSS Custodians Navy - YD1 Air Force - 99 Review Activities PREPARING ACTIVITY: Navy - YD1 (Proj ect 4520-0341) Amy - CE DLA - CS Navy - MC 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
