Ximi Elga

ASTM D1248 PDF

Buy ASTM D SPECIFICATION FOR POLYETHYLENE PLASTICS EXTRUSION MATERIALS FOR WIRE AND CABLE from SAI. This standard is issued under the fixed designation D ; the 1 This specification is under the jurisdiction of ASTM Committee D20 on. ASTM D Standard Specification for Polyethylene Plastics Extrusion Materials for Wire and Cable.

Author: Zuzuru Akinotaur
Country: Sri Lanka
Language: English (Spanish)
Genre: Business
Published (Last): 6 September 2014
Pages: 186
PDF File Size: 8.2 Mb
ePub File Size: 14.13 Mb
ISBN: 649-1-94757-550-2
Downloads: 60199
Price: Free* [*Free Regsitration Required]
Uploader: Jugal

D — 05 Standard Speci? A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. The tests involved in this speci? It is not the function of this speci? This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine atm applicability of regulatory limitations prior to use.

NOTE 2—This standard has undergone major revision from the reapproval of and now covers only polyethylene for wire and cable applications. For information regarding molding and extrusion materials, see Speci? For information regarding plastic pipe materials, see Speci?

Current edition approved March 1, Originally approved asfm Last previous edition approved in as D – The following terminology is in use in ASTM speci? The former is the criterion for assignment as to type, the latter for designation as to category. Other attributes important to the user for certain applications are covered by three general classes and by specifying in greater detail, by grades, a minimum number of key characteristics covered too broadly or not at all by the type, class, and category designations.

NOTE 4—It is recognized that some high-density polyethylene plastics of very high molecular weight may have densities slightly less than 0. Similarly, there are other polyethylene plastics of very high molecular weight having densities slightly less than 0. NOTE 6—Carbon black 35 nm or less in average particle diameter is used as required in black electrical and jacketing materials Grades E and J to impart maximum weather resistance.

Basis of Purchase 5. Warning—The expected service lifetime of Class D materials is very dependent upon the speci? Contact your supplier for additional information regarding this issue. Solution viscosity is recommended as a means of distinguishing such materials.

NOTE 8—Tables 4 and 5, are 1d248 to correspond with the grades speci? Other grades may be added as necessary by revision of this speci? Also, it is anticipated that additional requirements may be added under a given d12448 designation by future revision to provide more meaningful characterization of the material covered by such designation.

Materials and Manufacture 6. If necessary, level of contamination may be agreed upon between the seller and the purchaser.

ASTM D1248 Polyethylene Plastics Extrusion for Wire and Cable | Test Equipment

Adequate statistical sampling prior to packaging shall be considered an acceptable alternative. Classes A, B Water immersion stability 8 [] — E2 10 [] — E3 10 [] — E4 12 [] —75 E5 12 [] —75 E6 17 [] — E7 17 [] — E8 19 [] —75 48 96 E9 19 [] —75 48 96 E10 22 [] —75 48 0. J3 12 [] —75 J4 19 [] —75 J5 22 [] —75 The letters associated with these grades identify areas of potential applicability as indicated below: E At any frequency from 1 kHz through 1 MHz see also F Dielectric constant qstm a function of density; hence, the nominal value will be different for each type.

  LEXMARK W850 PDF

Based on published information, the nominal values for the? To illustrate the manner in which the maximum limit for the dielectric constant of a particular, grade is determined, assume that a Type I, Class A material is to be supplied under Grade E2, then its maximum limit for dielectric constant will be 2.

G Dissipation factor and dielectric constant must not exceed the limits speci? However, because this test is lengthy, it need not be performed on every lot of material. Rather, the material is to be checked astmm for ast, with this requirement and, after that, as often as necessary to assure continued compliance. For routine inspection, only those tests necessary to identify the material to the satisfaction of the purchaser shall be required.

One sample shall be sufficient for testing each batch or lot provided that the average values for all of the tests made on that batch or lot comply with the speci? Test specimens, 7 mm or under in thickness, shall be conditioned for a minimum of 40 h immediately prior to testing.

Test specimens over 7 mm in thickness shall be conditioned for 88 h. For all materials to be conditioned for electrical testing, conditioning shall comply with the requirements of the standard test methods for electrical testing. In all cases the laboratory shall report both the temperature and humidity conditions during the conditioning period. For all materials to be tested for electrical properties, the laboratory shall comply with the requirements of the standard test methods for electrical testing.

In all cases the laboratory shall report aatm the temperature and humidity conditions during testing. Make duplicate determinations using two separate portions of the same molding or from two moldings. The molded specimen thickness shall be 1.

Condition only as speci? Make duplicate determinations on the material in the form of powder, granules, or pellets. No conditioning is required. The melt viscosity of polyethylene plastics, in common with that of most high polymers, is non-Newtonian, that is, dependent on the rate of shear. The degree of departure from Newtonian behavior depends on the atm and molecular constitution of the individual sample. Additional characterization of the sample can be obtained if other conditions are used.

If Test Method D is used, it must be known that no inorganic pigments or? Make duplicate determinations from a sample of the material in the form of powder, granules, or pellets.

NOTE 12—If it is known or suspected that the material contains moisture, the sample should be dried prior to being tested, but otherwise no conditioning is required. Specimens shall be either die cut or machined to the speci? Bench marks or a high asmt extensometer shall ast used for the determination of elongation at break.

  KAHLIL GIBRAN PROROK PDF

The initial distance between the bench marks or extensometer grips shall 6 be The initial grip separation shall be Test results for specimens that break outside the gage-marks after extensive cold drawing need not be discarded unless the break occurs between the contact surfaces of a grip.

The following additional instructions and the precautions of Note 12 shall be observed: For such materials, the milling procedure described in Its purpose is to establish that a suitable antioxidant is aetm in adequate quantity. After being milled as d2148, the material shall meet the dielectric requirements prescribed in Table 3.

Any other size two-roll laboratory mill may be used provided the charge is adequate to maintain a uniform rolling bank on the rolls and to furnish sufficient material for test specimens.

ASTM D Polyethylene Plastics Extrusion for Wire and Cable | Test Equipment

D — 05 Conditioning and test conditions shall be as speci? NOTE 13—Test specimens, particularly those molded of compounds containing carbon black, should be tested immediately after conditioning and their storage under humid conditions should be avoided. Irradiance at the control point shall be maintained at 0. NOTE 16—The irradiance level aastm the unit that does not have irradiance control is reported to be 0.

However, the degradation rate of polyethylene has been found to be more variable than in the d12488 controlled unit and may be as little as 1? However, the non-irradiance control machine can still be used for relative weatherability comparison among different materials weathered at the same time.

NOTE 17—It should be noted that the irradiation spectra from different xstm including carbon arc, xenon arc, and UV? Therefore, the effects of the exposures described in Prepare the specimens in accordance with Test Methods D for physical adtm of insulations and jackets. Perform the tests in accordance with Practices DG and G using? The exposure cycle consists of a light cycle of 10 h with 18 minutes water spray on the front surface during each 2 h period followed by a dark ashm of 2 h with continuous water spray on the back surface.

NOTE 14—The h exposure period speci? D12248 15—Longer periods of exposure will be required for older xenon-arc machines operated at irradiance of 0. Retest and Rejection Packaging and Package Marking Prepare the specimens in accordance with Methods D for physical tests of insulations and jackets.

Perform the tests in asmt with Practices GGand D using the following exposure conditions: Sampling for inspection and testing shall be carried out in accordance with the recommendations of Practice D Selection of acceptable quality level AQL and of inspection level IL shall be made, with consideration of the speci? This is discussed in Practice D In the absence of contrary requirements, the following values shall apply: