NAVY MIL-STD-1362 A-1987 PROCEDURES FOR STEAM PURITY MEASUREMENT NAVAL PROPULSION BOILERS《海军动力锅蒸汽纯度测量程序》.pdf

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1、MIL-STD-1362A 44 9999933 0034483 9 Pl1 L - STD - 136 2A (SH ) 6 July 1987 SUPERSEDING EIIL-STD-l362(SHIPS) 18 September 1970 (See 6.2) PIILITARY STANDARD PROCEDURES FOR STEAM PURITY NEASUREMENT NAVAL PROPULSION BOILERS AMSC N/A FSC 4410 DISTRIBUTION STATEMENT A Approved for public release; distribut

2、ion unlimited Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL- STD - 13 6 2A (SH) 6 July 1987 DEPARTMENT OF THE NAVY NAVAL SEA SYSTEMS COMMAND Washington, DC 20362-5101 Procedures for Steam Purity Measurement Naval Propulsion Boilers 1. This Mili

3、tary Standard is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agencies o the Department of Defense. 2. Beneficial comments (recommendations, additions, deletions) and any pertinent data wliich may be of use in improving th

4、is document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. i Provided by IHSNot for

5、ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-STD-lt362A 44 33779IL 0034483 I W 6 July 1987 NIL- STD o 13624 (Sil) CONTENTS Paragraph 1 . SCOPE . 1.2 Application 1.1 Purpose . 2 . REFERENCED DOCUMENTS . 2.1 Government documents 2.1.2 Other Government publication 2.2

6、Other publications 2.3 Order of precedence . 2.1.1 Specifications . 3 . DEFINITIONS (Not applicable) . 4 . GENERAL REQUIREMENTS . 4.1 Steam purity 4.2 Test requirements . 4.3 Prerequisite 5 . DETAILED REQUIRENENTS 5.1 Boiler loading determination 5.1.1 Fuel oil pressure . 5.2 Water level determinati

7、on . 5.3 Boiler water chemistry adjustment . 5.3.1 Disodium phosphate addition . 5,3.2 Maintenance of boiler water chemistry . 5.4 Saturated steam sample equipment installation . 5.4.1 Steam sample nozzle . 5.4.1.1 Port diameter . 5.4.1.2 Minimum port diameter . 5.4.1.3 Construction and installation

8、 . 5.4.2 Sample line . 5.4.3 Sample cooler . 5.4.4 Sample flow meter . 5.5 Steam sample flow rate 5.6 5.6.1 Procedure . 5.6.1.1 Laboratory check out 5.6.1.2 Initiation of sample flow . 5.7 Determination of sodium in boiler water . 5.7.1 Boiler water electrical conductivity 5.8 General procedure . 5.

9、8.1 Test procedure Monitoring steam condensate for sodium 1 1 1 2 4 4 5 5 5 5 5 6 6 6 6 6 7 7 8 8 8 ii Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-PlIL-STD-L362A 4L1 9947733 0034LIL1 3 HIIL-STIi- 1362A (str) 6 July 1987 CONTENTS - Continued Parag

10、raph 5.9 Confirmation of shipboard test results 8 5.10 Recording of results. . 9 5.11 Boiler care after tests. 9 6. NOTES . 9 6.1 Subject term (key word) listing 9 6.2 Changes from previous issue 9 FIGURES Figuro 1. Flow diagram 10 2. Nozzle details. . 11 3. Nozzle assembly . 12 4. Nozzle installati

11、on . 13 5. Form for steam purity test data . 14 TABLES Tab 1 e I. Fuel oil pressure for selected boiler load . 3 II. Sample flow rate requirements 6 III. to p/m sodium. 7 Factor to convert boiler water conductivity iii Provided by IHSNot for ResaleNo reproduction or networking permitted without lice

12、nse from IHS-,-,-MIL-STD-5362A 4Ll 77777LL 003Ll485 5 FIIL-STD- 1363ACSH) 6 July 1987 1. SCOPE 1.1 Purpose. This standard covers the procedure for the determination of steam purity in Naval propulsion boilers. 1.2 Application. The procedure shall be used during acceptance trials of new boilers to de

13、termine that the quality assurance requirements for steam purity conform to MIL-B-18381. The procedure shall also be used whenever a Naval propulsion boiler is tested for steam purity. 2. REFERENCED DOCUMENTS 2.1 Government documents. 2.1.1 Specifications. Unless otherwise specified, the following s

14、pecifications of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DoDISS) specified in the solicitation form a part of this standard to the extent specified herein. SPECIFICATIONS FI1 LITARY MIL-C-17557 - Coolers, Fluid, Industrial, Naval Shipboard M

15、IL-B-18381 - Boilers, Steam, High Pressure, Naval Ship (Sample Water Coolers). Propulsion. 2.1.2 Other Government publication. The following other Government publication forms a part of this standard to the extent specified herein. PUBLICATION NAVAL SEA SYSTEFIS COFIMAND (NAVSEA) S9086-GX-STM-O20/CH

16、 220 V2 - Boiler Water/Feedwater Test and Treatment. (Copies of specifications and publications required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.2 Other publications. The following

17、 documents form a part of this standard to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted shall be those listed in the issue of the DoDISS specified in the solicitation. The issues of documents which have not been adopted shall be those in

18、effect on the date of the cited DoDISS. 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-?1 IL- ST1) - 136 2A (SEI ) 6 July 1987 ANERICAN SOCIETY FOR TESTING AND NATERIALS (ASTM) D 1066 - Standard Practice for Sampling Steam. (DoD adopted) D 1125 -

19、Standard Test Methods for Electrical Conductivity D 1428 - Standard Test Methods for Sodium and Potassium in and Resistivity of Water. Water and Water-Formed Deposits in Flame Photometry. (DoD adopted) Sodium in Water. (DoD adopted) D 2791 - Standard Nethods for Continuous Determination of (Applicat

20、ion for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASPIE) Power Test Code PTC 19.11 - Water and Steam in the Power Cycle (Purity and Quality, Leak Detection and Measurement). (Appl

21、ication for copies should be addressed to the American Society of Fleckanieal Engineers, 345 East 47th Street, New York, NY 10017.) AMERICAN IRON AND STEEL INSTITUTE (AISI) Steel Products Manual Stainless and Heat Resisting Steels. (Application for copies should be addressed to the American Iron and

22、 Steel Institute, 150 East 42nd Street, New York, NY 10017.) (Nongovernment Standards are generally available for reference from libraries. using Federal agencies.) They are also distributed among nongovernment standards bodies and 2.3 grder of precedence. In the event of a conflict between the text

23、 of this standard and the references cited herein, the text of this standard shall take precedence. 3. DEFINITIONS (Not applicable) 4. GENERAL REQUIRENENTS 4.1 Steam purity. The purity of the steam from the steam drum shall be determined by comparing the sodium content of the steam to that of the bo

24、iler water. The steam sodium shall be measured in a continuous, isokinetic sample flaw using an electrode specific to the sodium ion. shall be derived from the boiler water electrical conductivity. The boiler water sodium 4.2 Test requirements. In order to meet the requirements of MIL-B-18381, the b

25、oiler water total dissolved solids level shall be raised to 1100 f 50 parts per million (p/m) using disodium phosphate (anhydrous). ore monitored at 40, 70, 100, and 120 percent boiler load, and over the water levsl range given in the applicable boiler specification. The sodium levels 2 Provided by

26、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2362A 44 7777712 0034987 7 W E (CfD/lOOX) Rate per burner at load ( 1b/hr) I.11 L - SID - 1 3 b 21 ( SH 6 July 1987 F Fuel oil pressure ( lb/in2 ) 4.3 Prexequisite. Prior to steam purity testing, the boiler

27、 sliall be inspected by a NAVSEA-approved boiler inspector to ensure that the installation of the steam drum internals is satisfactory and in accordance with the NAVSEA-approved configuration. A 5. DETAILED REQUIREMENTS B C D 5.1 Boiler loading determination. The boiler loading determination is depe

28、ndent upon the boiler full power oil rate, the number of fuel burners in use, and the burner sprayer plate in use. Full power 5.1.1 Fuel oil pressure. The fuel oil pressure, pound per square inch (lb/in2), required to obtain the selected boiler loading shall be determined with the aid of table I. Th

29、e design boiler full power fuel oil rate, pounds per hour (lb/hr), is found in the applicable boiler technical manual. No. of TABLE I. Fuel oil pressure for selecte I fuel oil rate I burners I burner I load (lb/hr) (percent) 40 5.2 Water level determination. The steam drum water level shall be deter

30、mined from the direct reading water gauge normally used for water level control during manual operation. An inch scale, indicating levels above and below normal, shall be attached to the water gauge. The normal water level, with respect to the steam drum center line, shall be accurately determined f

31、rom the boiler manufacturers drawings. 5.3 Boiler water chemistry adjustment. The level of total dissolved solids in the boiler water shall be increased to 1100 f SO p/m with disodium phosphate to meet the requirements of MIL-B-18381. This level of dissolved solids corresponds to a boiler water cond

32、uctivity of 1500 f 100 micromhos per centimeter (mho/cm). the boiler shall be steaming with stable water chemistry and no indications of contamination in accordance with NAVSEA S9086-GX-STM-O20/CH 220 V2. load shall be between 40 and 70 percent to assure rapid circulation of the disodium phosphate.

33、Prior to the start of the disodium phosphate addition, The boiler 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-STD-13bZA L(L( 9999911 003qYBB O hIL-SlD-l36?A(SH) 6 July 1987 5.3.1 - nisodiakphate addition. The. boiler water voliime for chem

34、ical treatment and the procedures for sampling and ctiemical addition shall be in accordance Kith NAISEA S908-GX-STkl-O20/CH 220 V2. pliospliate sliall be discontinued if difficulty is found in raising the conduc- tivity because of excessivo carryover, chemical hideout, or other problems. The proced

35、ure for increasing the total dissolved solids level shall be as follows : The addition of disodium (a) (b) Sample the boiler water and test for conductivity in accordance Calculate the amount of disodium phosphate required using: with 5.7.1. (C - C) XOOO W= k = ounces of anhydrous disodium phosphate

36、 Where : W C = desired conductivity, pmho/cm C =: measured conductivity, umlio/cin k = factor giving the increase in conductivity caused by 1 ounce disodium phosphate per 1000 gallons water (10 pmlio/cm increase per ounce per 1000 gallons) V = boiler water volume, gallons (c) (ci) (o) Repeat steps (

37、b) through (d) until the conductivity is 1500 f 190 Add the calculated amount of disodium phosphate or 80 ounces, Obtain another sample of the boiler water 30 minutes after the whichever is less, to the boiler. addition and test for conductivity. tmho/ cm . 5.3.2 llaintenance of boiler water chemist

38、ry. All adjustments of boiler water conditions shall be performed and the conditions stabilized prior to the aetual test run. blowdown. necessary that this range be maintained throughout the test. contamination occurs the tests shall be secured and the contamination corrected. the test again. test t

39、o monitor for contamination. Excess dissolved solids shall be controlled by surface Once the conductivity is within the specified range, it is not However, if The boiler water conditions shall be readjusted prior to starting The boiler water chloride shall be tested hourly during the 5.4 mm sample e

40、quipment installation. The steam sampling equipment: and its installation described herein approach an isokinetic steam sample flow which results in representative sampling of the saturated steam. The cquipment and installation shall be in accordance with ASTM D 1066 and ASME PTC 19.11 using a multi

41、port sample nozzle. shown on figure 1. An overall flow diagram is 5.4.1 Steam sample nozzle. The design of the steam sample nozzle is dependent on the sceam line size, the rate of steam flow, and the sample flow. A four-port nozzle shall be used for steam lines with an inside diameter (id) of 2 to 6

42、 inches. A six-port nozzle shall be used for steam lines with an id greater than 6 inches. The location of the ports in the two nozzle types shall be as shown on figure 2. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-13bZA 44 = 779771L 0

43、034489 2 W PIIL-STD- 132A (SHI 6 July 1987 5.4.1.1 Port diameter. The diameter of the ports for a sample flow at full power of 66 pounds per hour (lb/hr) (500 milliliters per minute (mL/min) shall be calculated as follows: d =E Where : d = diameter of the ports, inch f = sample flow at full power, l

44、b/hr D = id of the steam line, inches N = number of ports in the nozzle F = steam flow at full power, lb/hr 5.4.1.2 Minimum port diameter. The minimum port, diameter shall be 0.0625 inch. If the calculated diameter is less than 0.0625 inch, a port size of 0.0625 inch shall be used, and the sample fl

45、ow shall be increased. The new boiler full power sample flow shall be calculated by using the formula in 5.4.1.1 and multiplying by 7.57 to convert lb/hr to mL/min. If this sample flow is greater than the sample cooler capacity, the number of ports may be reduced and the required sample flow recalcu

46、lated. 5.4.1.3 Construction and installation. The nozzle shall be fabricated from AISI type 321 or 347 corrosion resistant tubing, 0.500 inch outside diameter (od) by 0.065 inch wall. The nozzle shall be constructed as shown on figures 2 and 3 and installed as shown on figure 4. The controlling dime

47、nsions, A and G (see figure 2), shall be obtained for each specific installation as shown on figure 4. ensure that the ports of the installed nozzle face directly upstream. transverse witness mark shall be inscribed on the nozzle at a reference point for laterally positioning the nozzle such that th

48、e center line of the nozzle ports will coincide with the center line of the steam line. located in the saturated steam line within one to four steam line diameters of the steam drum. Alternate locations shall be approved by NAVSEA. The longitudinal mark shall provide a positioning reference to A The

49、 nozzle shall be 5.4.2 Sample line, The sample line shall be of AISI type 316L corrosion resistant tubing, 1/4 inch od by 0.035 inch wall. The total length of sample line shall be as short as practical. The sample line shall have a gradual slope down from the sample nozzle to its connection with the cooler. The sample line shall be installed in such a manner as to prevent accidental contact with the hot li