Markings

7.1 Scope

In addition to any other marking requirements set out in this standard, the marking requirements of this section apply.

7.2 Tank Car Stencilled Markings

7.2.1 AAR Requirements

A tank car must be marked in accordance with the requirements set out in Appendix C of the AAR Specifications for Tank Cars publication with the exception that the requirements of par. C3.3.1.3 relative to commodity markings do not apply. For tank cars that are cleaned or purged so that a hazard no longer exists, all commodity markings, if any, must be removed or covered.

7.2.2 Puncture Resistance System

A tank car that requires and that is equipped with a tank-head puncture-resistance system must have the letter "S" substituted for the letter "A" in the specification marking.

7.2.3 Jacketed Thermal Protection

A tank car that requires a tank-head puncture-resistance system and a thermal protection system and that is equipped with a tank-head puncture-resistance system and a thermal protection system with a metal jacket must have the letter "J" substituted for the letter "A" or "S" in the specification marking.

7.2.4 Non-Jacketed Thermal Protection

A tank car that requires a tank-head puncture-resistance system and a thermal protection system and that is equipped with a tank-head puncture-resistance system and a thermal protection system without a metal jacket must have the letter "T" substituted for the letter "A" or "S" in the specification marking.

7.2.5 Interim Tank Cars 

A tank car that was manufactured after the coming into force of this standard to meet the requirements of clauses 10.5.1.2 b. or 10.5.1.2 c. or special provisions, 62, 64, 65, 80, 81, 82 or 83 must have the letter "I" substituted for the letter "W" in the specification marking.

7.2.6 Specific Dangerous Goods Service

If a tank car is marked for one dangerous goods service, the tank car must not be used in the handling, offering for transport, or transporting of any other dangerous goods service, while so marked.

7.2.7 Delayed Installation

When a pressure-relief device is qualified within six months of installation on a tank car and is protected from deterioration during that period of time, the qualification date of the pressure-relief device marked on the tank car must be either the installation date of the device on the tank car or the qualification date of the pressure-relief device.

7.3 Identification Plates

7.3.1 Alternative to Permanent Markings

As an alternative to the permanent markings required by a tank car specification, including clauses 8.3.20, 8.4.21, and 8.6.22, a tank car may be equipped with tank identification plates conforming to clauses 7.3.1.1 to 7.3.1.3. Tank cars manufactured after the coming into force of this standard must conform to clauses 7.3.1.1 to 7.3.1.3.

7.3.1.1

The tank manufacturer must install two identical permanent identification plates, one located on both inboard surfaces of the body bolsters of the tank car. One identification plate must be installed on the right side (AR) of the tank car, and the other must be installed on the back end left side (BL) body bolster webs so that each plate is readily accessible for inspection. The plates must be at least 3⁄32 inch thick and manufactured from corrosion resistant metal. When the tank jacket (flashing) covers the body bolster web and identification plates, additional identical plates must be installed on the AR and BL corners of the tank in a visible location.

7.3.1.2

Each plate must be stamped, embossed, or otherwise marked by an equally durable method in letters 3⁄16 inch high with the following information (parenthetical abbreviations may be used), and the AAR form reference is to the applicable provisions of the AAR Specifications for Tank Cars publication:

  1. Tank Manufacturer (Tank MFG): Full name of the car builder as shown on the certificate of construction (AAR form 4-2).
  2. Tank Manufacturer's Serial Number (SERIAL NO): For the specific car.
  3. AAR Number (AAR NO): The AAR number from line 3 of AAR Form 4-2.
  4. Tank Specification (SPECIFICATION): The specification to which the tank was built from line 7 of AAR form 4-2.
  5. Tank Shell Material/Head Material (SHELL MATL/HEAD MATL): ASTM or AAR specification of the material used in the construction of the tank shell and heads from lines 15 and 16 of AAR Form 4-2. For Class 113,115, AAR-204W, and AAR-206W, the materials used in the construction of the outer tank shell and heads must be listed. Only list the alloy (e.g., 5154) for aluminum tanks and the type (e.g., 304L or 316L) for stainless steel tanks.
  6. Insulation Material (INSULATION MATL): Generic names of the first and second layer of any thermal protection/insulation material applied.
  7. Insulation Thickness (INSULATION THICKNESS): In inches.
  8. Underframe/Stub Sill Type (UF/SS DESIGN): The design from Line 32 of AAR Form 4-2.
  9. Date of Manufacture (DATE OF MFR): The month and year of tank manufacture. If the underframe has a different built date than the tank, show both dates.

7.3.1.3

When a modification to the tank changes any of the information shown in clause 7.3.1.2, the car owner or the tank car facility making the modification must install an additional variable identification plate on the tank in accordance with clause 7.3.1.1 showing the following information:

  1. AAR Number (AAR NO): The AAR number from line 3 of AAR Form 4-2 for the alteration or conversion.
  2. All items of clause 7.3.1.2 that were modified, followed by the month and year of modification.

7.4 Qualification and Conversion Markings

7.4.1 Qualification Date and Due Date

When a tank car passes the required qualification for an item referred to in clause 9.3, the tank car facility must mark on the tank car the date on which the tank car was qualified and the due date for the next qualification in conformance with the requirements set out in Appendix C of the AAR Specifications for Tank Cars publication.

Previous Page | Table of Contents | Next Page

Date modified: