1. Scope

1.1 This specification covers composite ribbed steel pipe, precoated and polyethylene lined intended for use for gravity flow sanitary sewers, storm sewers, and other special applications such as water transmission pipe, rehabilitation pipe, slip line pipe, and irrigation pipe where extra corrosion and abrasion resistance are required. The steel sheet used in the fabrication of the pipe has a polymer coating over a metallic coating of zinc on both sides. In addition, as the pipe is being fabricated, the ribs are filled with polyethylene and then a polyethylene liner is extruded onto the interior surface.

1.2 The exterior polymer precoating provides extra protection of the steel against soilside corrosion, in addition to that provided by the metallic coating, and also provides a dielectric barrier for cathodic protection. The interior polymer precoating provides an adhesive layer between the galvanized steel and the polyethylene lining. The applied lining provides internal protection against corrosion, erosion, and abrasion. By filling the rib which has a deltoid shape (smaller at the opening in the pipe wall than at the bottom of the rib), the polyethylene is mechanically connected to the pipe wall and the polyethylene liner is then thermally bonded to the filled rib.

1.3 This specification does not include requirements for bedding, backfill, or the relationship between earth cover load and sheet thickness of the pipe. Experience has shown that the successful performance of this product depends upon the proper selection of sheet thickness, type of bedding and backfill, controlled manufacture in the plant, and care in the installation. The installation procedure is described in Practice A 798.

1.4 This specification is applicable to orders in either inch-pound units as A 978, or in SI units as A 978M. Inch-pound units and SI units are not necessarily equivalent. SI units are shown in brackets in the text for clarity, but they are the applicable values when the material is ordered to A 978M.

1.5 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 the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

A90/A90M Test Method for Weight [Mass] of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings

A153/A153M Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

A307 Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength

A563 Specification for Carbon and Alloy Steel Nuts

A563M Specification for Carbon and Alloy Steel Nuts (Metric)

A742/A742M Specification for Steel Sheet, Metallic Coated and Polymer Precoated for Corrugated Steel Pipe

A780 Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings

A796/A796M Practice for Structural Design of Corrugated Steel Pipe, Pipe-Arches, and Arches for Storm and Sanitary Sewers and Other Buried Applications

A798/A798M Practice for Installing Factory-Made Corrugated Steel Pipe for Sewers and Other Applications

A902 Terminology Relating to Metallic Coated Steel Products

A926 Test Method for Comparing the Abrasion Resistance of Coating Materials for Corrugated Metal Pipe

A929/A929M Specification for Steel Sheet, Metallic-Coated by the Hot-Dip Process for Corrugated Steel Pipe

B633 Specification for Electrodeposited Coatings of Zinc on Iron and Steel

B695 Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel

C443 Specification for Joints for Concrete Pipe and Manholes, Using Rubber Gaskets

C443M Specification for Joints for Concrete Pipe and Manholes, Using Rubber Gaskets (Metric)

D638 Test Method for Tensile Properties of Plastics

D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement

D1005 Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers

D1056 Specification for Flexible Cellular Materials--Sponge or Expanded Rubber

D1238 Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer

D1435 Practice for Outdoor Weathering of Plastics

D2240 Test Method for Rubber Property--Durometer Hardness

D3212 Specification for Joints for Drain and Sewer Plastic Pipes Using Flexible Elastomeric Seals

D5576 Practice for Determination of Structural Features in Polyolefins and Polyolefin Copolymers by Infrared Spectrophotometry (FT-IR)

D5630 Test Method for Ash Content in Plastics

F568M Specification for Carbon and Alloy Steel Externally Threaded Metric Fasteners (Metric)

F593 Specification for Stainless Steel Bolts, Hex Cap Screws, and Studs

F594 Specification for Stainless Steel Nuts

F738M Specification for Stainless Steel Metric Bolts, Screws, and Studs

F836M Specification for Style 1 Stainless Steel Metric Nuts (Metric)

AASHTO Standard

Keywords

composite ribbed steel pipe; irrigation pipe; liner pipe; polyethylene filled ribs and extruded liner; polyethylene lined steel pipe; polymer coated steel pipe; rehabilitation pipe; sanitary sewer pipe; slip line pipe; storm drain pipe; water transmission pipe; Composites--building applications (specifications); Irrigation piping--specifications; Liner pipe/plate--specifications; Polyethylene (PE) liner applications; Polymer coatings--steel; Rehabilitation--steel structures/applications; Sanitary drainage materials/applications--specifications; Sewer pipe (steel)--specifications; Sliplining; Storm sewer/drainage pipe--specifications; Water supply/distribution systems--specifications;

ICS Code

ICS Number Code 23.040.10 (Iron and steel pipes)

DOI: 10.1520/A0978_A0978M-97R02E01

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