AASHTO M 245-00 pdf free download

AASHTO M 245-00 pdf free download.Corrugated Steel Pipe, Polymer- Precoated, for Sewers and Drains.
6. MATERIALS
6.1. Steel Sheet for Pipe- -All pipe fabricated under this specification shall be formed from polymer- precoated sheet conforming to M 246.
6.1.1. The grade of coating shall be stated in the order, and the polymer coating thickness on both inside and outside of the pipe. The polymer coating is classified by grade corresponding to the thickness in micrometers on each side in SI units (see Table 1).
6.1.1.1. Any combination of polymer coating thickness or other than shown in Table 1 is subject to agreement between the manufacturer and purchaser or fabricator.
6.1.2. The polymer coating is applied to steel sheet having a metallic coating of zinc or aluminum-zinc alloy, as described in M 218, M 289, or ASTM A929/A929M. The type of metallic coating should be stated in the order, consistent with thickness availability as shown in Table 9. If the type of metallic coating is not stated, zinc-coated sheet conforming to M 218 shall he used. All pipe furnished on the order shall have the same metallic coating unless otherwise specified.
6.2. Steel Sheet for coupling Batzds—Thc sheet used in fabricating coupling bands shall conform to M 246 with the same polymer coating grade as that used for fabrication of the pipe furnished under the order, and having the same metallic coating.
6.2.1. As an alternate, the steel sheet for coupling bands shall conform to M 218, M 289, or ASTM A929/A929M (with the same metallic coating as the pipe), with the sheet having a bituminous coating according to M 190. except the thickness requirement shall not apply.
6.2.2. When specifically permitted by the purchaser, coupling bands shall be made of steel sheet conforming to the specification listed in Section 6.2. 1 having the same metallic coating as the pipe, but without bituminous coating.
6.3. Rii’ets—The rivets used in riveted pipe shall be of the same material as the base metal specified for the corrugated sheets. They shall be thoroughly galvanized or sherardized. If bolts and nuts are substituted for rivets (Section 7.3.1), they shall meet the following requirements (see Table 2).
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6.4. Hard ware for coupling Bands—Bolts and nuts for coupling bands shall conform to the following requirements. (See Table 2.) Bolts, nuts, and other threaded items used with coupling bands shall be zinc coated by one of the following processes: hot-dip process as provided in M 232M/M 232; electroplating process as provided in ASTM B633, Class Fe/Zn 8; or mechanical process as provided in ASTM B695, Class 8. Other hardware items used with coupling bands shall be zinc coated by one of the following processes: hot-dip process as provided in M 232M/M 232; electroplating process as provided in ASTM B633, Class Fe/Zn 25; or mechanical process as provided in ASTM B695, Class 25.
6.5. Gaskets—If gaskets are used in couplings, they shall be a band of expanded rubber meeting the requirements of ASTM D 1056 for the bbRE closed cell grades, or 0-rings meeting the requirements of ASTM C990.
7. FABRICATION
7.1. General Requiremems—Pipe shall be fabricated in full circular cross section except for Type lilA, which is described in Section 8.4.
7.1.1. Type I pipe shall have annular corrugations with lap joints fastened with rivets or shall have helical corrugations with a continuous lock seam extending from end to end of each length of pipe. The type of fabrication used shall be the option of the fabricator unless otherwise specified.AASHTO M 245-00 pdf download.