1、DD-G-511E September 15, 1983 SUPERSEDING Fed. Spec. DD-G-511D May 17, 1966 (See 6.4) FEDERAL SPECIFICATION GLASS TUBING, ROUND This specification was approved by the Assistant Administrator, Office of Federal Supply and Services, General Services Administration, for the use of all Federal agencies.
2、1, SCOPE AND CLASSIFICATION 1.1 Scope. This specification covers heat-resistant, high pressure glass tubing for use in liquid level gages on low pressure boilers (250 pounds per square inch (lbIin2) maximum) and hot water tanks. 1.2 Classification. 1.2.1 Sizes. .Glass tubing shall be of the followin
3、g outside diameters (0.d.) as specified (see 3.5 and 6.2.1): Outside diameters - 318-, 112-, 518-, 314-, 718-, and 1-inch. 2 APPLICABLE DOCUMENTS 2.1 The following docunents, of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the exten
4、t specified herein: Federal Specifications PPP-B-566 - Boxes, Folding, Paperboard. PPP-B-601 - Boxes, Wood, Cleated-Plywood. PPP-B-621 - Boxes, Wood, Nailed and Lock-Corner. PPP-B-636 - Boxes, Shipping, Fiberboard. PPP-P-291 - Paperboard, Wrapping and Cushioning. . Federal Standard FED-STD-123 - Mar
5、king for Shipment (Civil Agencies). (Activities outside the Federal Government may obtain copies of Federal specifications, standards, and commercial item descriptions as outlined under General Information in the Index of Federal Specifications, Standards and Commercial Item Descriptions. The Index,
6、 which includes cumulative bimonthly supplements as issued, is for sale on a subscription basis by the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402. THIS DOCUMENT CONTAINS- 7 PAGES. FSC 9340 Licensed by Information Handling ServicesProvided by IHSNot for ResaleN
7、o reproduction or networking permitted without license from IHS-,-,-% DD-G-SLLE 73 7777774 000b02 7 DD-G-5 11E (Single copies of this specification, and other Federal specifications and commercial item descriptions required by activities outside the Federal Govern- ment for bidding purposes are avai
8、lable without charge from General Services Administration Business Service Centers in Boston; New York; Philadelphia; Washington, DC; Atlanta; Chicago; Kansas City, MO; Fort Worth; Houston; Denver; San Francisco; Los Angeles; and Seattle, WA. (Federal Government activities may obtain copies of Feder
9、al standardization documents and the Index of Federal Specifications, Standards and Commercial Item Descriptions from established distribution points in their agencies.) Military Standards MIL-STD-105 - Sampling Procedures and Tables for Inspection by MIL-STD-129 - Marking for Shipment and Storage.
10、Attributes. (Copies of military specifications and standards required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 3 REQUIREMENTS 3.1 First article. When specified (see 6.2.1), the contract
11、or shall furnish sample unit(s) for first article inspection and approval (see 4.3 and 6.3) 3.2 Material. Tubing shall be manufactured of annealed borosilicate transparent glass. Tubing ends shall be as specified (see 6.2.1). 3.2.1 Recovered materials. Unless otherwise specified herein, all equip- m
12、ent, material, and articles incorporated in the products covered by this speci- fication shall be new and shall be fabricated using materials produced from recovered materials to the maximum extent practicable without jeopardizing the intended use. The tem “recovered materials“ means materials which
13、 have been collected or recovered from solid waste and reprocessed to become a source of raw materials as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use of used or rebuilt products is allowed under this specification unless otherwise specifically specifi
14、ed. 3.3 Thermal shock. Glass tubes shall be tested in accordance with 4.6.1 and shall withstand a sudden temperature change from 212 to 43 degrees Fahren- heit (OF), except that the 7/8- and 1-inch diameter sizes shall withstand temper- ature changes from 150 to 43“F, without spalling or cracking. 3
15、.4 Hydrostatic pressure. Glass tubing shall be tested in accordance with 4.6.2 and shall withstand sudden gage pressure changes of 300 pounds force per square inch (lbf/in2), from O lbf/in2 without evidence of cracking or breaking. 3.5 Dimensions. Nominal diameter and cut length of glass tubing shal
16、l be as specified (see 6.2.1). Length shall not be over 24 inches and shall be within plus or minus 1/8 inch of required length. 0.d. shall be within plus or minus 3/64 inch of required diameter. Wall thickness shall be as follows: 2 Provided by IHSNot for ResaleNo reproduction or networking permitt
17、ed without license from IHS-,-,-DD-G-SLLE 73 7777774 0008603 7 DD-G- 5 1 1E Outside diameter Minimurc wall thickness Maximum wall thickness (inch) ( inch ) (inch) i/ 16 1/16 5/64 3/32 3/ 32 3/ 32 5/32 5/ 32 5/ 32 5/32 S/ 32 5/ 32 3.6 Workmanship. Glass tubi-ig shall be free of imperfections such as
18、cracks, breaks, bulges, blisters or scratches. Tubing shall be free of warp or twist. Bow tolerance shall be a maximum of 0.016 inch for lengths up to 14.9 inches. Above this length, the maximum acceptable bow tolerance shall be 0.032 inch. rough or chipped edges. Tubing out-of-roundness shall be wi
19、thin 2 percent of the nominal 0.d. Ends shall be cut square within 1/16 inch and shall be free of 4 QU& ITY AS CUANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract, the contractor is responsible for the performance of all inspection requirements as specifie
20、d herein. the contractor nay use his own or any other facilities suitable for the per- formance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspec- tions set forth in the specification where such inspe
21、ctions are deemed necessary to assure supplies and services conform to prescribed requirements. Except as otherwise specified in the contract, -4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: (a) First article inspection (see 4-3). (b) Quali
22、ty conformance inspection (see 4.4). 4.3 First article inspection. First article inspection shall consist of the examination of 4.5 and tests specified in 4.6.1 and 4.6.2. Failure of the first article to pass any examination or test shall be cause for rejection. 4.4 Quality conformance inspection. G
23、lass tubing samples shall be examined as specified in 4.5 and tested as specified in 4.6.1 and 4.6.2. 4.4.1 Sampling. 4.4.1.1 Unit of sample. A unit of sample is defined as a glass tube of specified diameter. For purposes of sampling, a lot shall consist of all glass tubes of one size produced under
24、 essentially the same conditions and offered for delivery at one time. . 4.4.1.2 Sampling for examination. Sampling for examination shall be in accordance with MIL-STD-105, with an acceptable quality level (AQL) of 1.5 percent defective for major defects and 2.5 percent defective for minor defects.
25、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DD-G-SLLE 93 m 7777774 0008604 O m None defined DD-G-5 11E 4.4.1.3 Sampling for tests. Sampling for tests shall be in accordance with MIL-STD-105, inspection level S-1, with an AQL of 6.5 percent defect
26、ive. If any sample fails to conform to this specification, this shall be cause for rejection of the lot. 4.5 Examination. Samples selected in accordance with 4.4.1.2 shall be examined for defects as specified in table I. TABLE I. Classification of defects. Critical Major 101 102 103 104 105 106 107
27、Minor 201 I Tubing has chipped or rough end. I 4.6 Test methods. 4.6.1 Thermal shock. Glass tubing shall be tested as follows: Place sample lengths in boiling water at 212 - + 2F and heat for 2 minutes. For the larger 7/8- and 1-inch diameter tubes, temperature shall be 150 + 2F. At the end of the Z
28、-minute period and while at 212“F, or 150F for the Targer tubes, remove same tubing from the heated water and immediately quench it in water at 43 + 2F. Repeat this procedure (boiling at 212F or heating to 150F, then quenchTng at 43F) seven more times, (during or at the end of the test) of any glass
29、 tubing shall constitute a failure. Evidence of spalling, cracking or breaking 4.6.2 Hydrostatic pressure. Glass tubing shall be tested as follows: Install tubing in a liquid level gage mount, fill with water at 75 t 5F and connect a 300 lbf/in2 gage pressure supply of water, air or nitrogen gas to
30、the upper fitting and pressurize for 5 minutes. To protect personnel from injury by flying glass particles, in the event of breakage, a heavy wire screen guard shall be clamped onto the gage fittings and a safety shield protector placed in front of the screened liquid level gage. After 5 minutes of
31、pressurization, close-off and release pressure. This procedure shall be repeated two more times. Evidence of cracking cr breaking of any glass shall constitute a failure. 4.7 Packaging inspection. Sample packages and packs, and inspection of packaging, packing, and marking for shipment and storage s
32、hall be in accordance with the requirements of section 5 of this specification. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- DD-G-SLLE 73 - 3773774 000b05 2 W DD-G-511E 4.701 Unit of sample. For the purpose of inspection, a completed pack prepa
33、red for shipment shall be considered a unit of product. 4.7.2 Sampling. Sampling or examination shall be in accordance with MIL-STD-1 O 5 4.7.3 Examination. Samples selected in accordance with 4.7.2 shall be examined for the defects specified in table II. defective. AQL shall be 2.5 percent TABLE II
34、, Classification of defects (packaging). Critical Major 101 102 103 104 105 Minor None defined Materials and containers not as specified or levels A and B. Each incorrect material and each incorrect container shall constitute one defect. Each glass tubing not completely wrapped with paperboard cushi
35、oning for level A* Intermediate packaging not as specified for level A. Strapping not zinc coated for level A. Marking illegible, incomplete, or incorrect. 5. PREPARATION FOR DELIVERY (The preparation for delivery requirements specified herein apply only for direct Government procurements.) 5.1 Pres
36、ervation. Preservation shall be level A, B, or C, as specified (see 6.2.1). 5.1.1 Level Al Each glass tubing shall be completely wrapped, including the ends, with cushioning material conforming to type I, style 1, of PPP-P-291. Cushioned glass tubing shall be packed in a box conforming to style II o
37、f PPP-B-566 5.1.1.1 Intermediate pack. Packed glass tubing of like size shall be intermediate packed, in quantities not to exceed the weight limitation of the box, in boxes conforming to grade WC, style optional of PPP-B-636, and appendix thereto. 5.1.2 Level B. Glass tubing shall be packed as speci
38、fied for level A, except that the intermediate boxes shall be type CF, domestic class, variety SW, grade 275. 5 t Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DD-G-SLLE 73 m 777777L1 0008606 Li m DD-G-5 11E 5.193 Level C. Glass tubing shall be pac
39、ked to afford protection against deterioration and physical damage during shipment from the supply source to the first receiving activity for immediate use. wholesale packaging methods may be used when such meet the requirements of this level. The contractors normal retail or 5.2 Packing. 5.2.1 Leve
40、l A. Glass tubing, packed as specified in 5.1, shall be packed Packing shall be level A, B, or C, as specified (see 6.2.1). in quantities not to exceed 200 pounds gross weight in boxes conforming to class 2, style optional of PPP-B-621, or overseas type, style optional of PPP-B-601. to the applicabl
41、e box specification. Boxes shall be closed and strapped in accordance with the appendix Strapping shall be zinc coated. 5.2.2 Level B. Glass tubing, packed as specified in 5.1, shall be packed in quantities not to exceed the weight limitation of the box, in boxes conform- ing to grade VC, style opti
42、onal of PPP-B-636. Box closure, waterproofing, and reinforcing shall be in accordance with method V of the appendix to the box specification. 5.2.3 Level C. Glass tubing, packed as specified in 5.1, shall be packed in containers that will assure carrier acceptance and safe delivery at lowest rates i
43、n conpliance with rules and regulations applicable to the mode of transportation selected. 5.3 Marking. 5.3.1 Civil agencies. In addition to any special marking required by the contract (see 6.2.1), interior packs and shipping containers shall be marked in accordance with FED-STD-123. 5.3.2 Military
44、 agencies. 5.3.2.1 Level A and B packaging and packing. In addition to any special markings required (see 6.2.1), interior (unit and intermediate) packs and exterior shipping containers shall be marked in accordance with MIL-STD-129, including “FRAGILE“ markings. 5.3.2.2 Level C preservation and pac
45、king. Unit intermediate (when pro- vided) packs and -zxterior packs shall, as a minimum, be marked as follows by any means which provides legibility and durability: (a) National Stock Number (NSN) or part number when NSN is not available. (b) Noun nomenclature. (c) Quantity and unit of issue. (d) Co
46、ntract, purchase order, or delivery order number. (e) Additional markings as may be required (see 6.2.1). (f) Exterior shipping containers shall be marked with the appropriate address and caution marking except for full carloads or full truckloads to a single CONUS consignee. Provided by IHSNot for
47、ResaleNo reproduction or networking permitted without license from IHS-,-,- DD-G-CLLE 73 7777774 0008607 b = i DD-G-511E (8) One copy of the shipping documents and contract documentation shall be attached to the outside in an envelope or placed inside the container. THROW“ or “GLASS - HANDLE WITH CA
48、RE“. (h) “FRAGILE“ labels or markings such as “GLASS - DO NOT DROP OR 6. NOTES 6.1 Intended use. Glass tubing is intended for use on low pressure boiler (250 lb/in maximum) and hot water tank gage glasses. 6.2 Ordering data. 6.2.1 Acquisition requirements. Acquisition documents should specify the fo
49、llowing: (a) Title, number, and date of this specification. (b) When a first article is required for inspection and approval (c) Condition of tubing ends required (e.g., firepolished, ground or (d) Nominal diameter and length required (see 3.5). (e) Level of preservation and packing required (see 5.1 and 5.2). (f) Special markings required (see 5.3.1, 5.3.2.1, 5.3.2.2). (see 3.1). as cut) (see 3.2). 6.3 First article inspection. Invitations for bid
