ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS . 2006 1

RULES FOR BUILDING AND CLASSING

STEEL VESSELS 2006

NOTICE NO. 2 – March 2006

The following Rule Changes become EFFECTIVE AS OF 1 MARCH 2006.

(See http://www.eagle.org/rules/downloads.html for the consolidated version of the 2006 Steel Vessel Rules, with all Notices and Corrigenda incorporated.)

Notes - The date in the parentheses means the date that the Rule becomes effective for new construction based on the contract date for construction, unless otherwise noted. (See 1-1-4/3.3.)

COMMENTARY

For the 2006 edition, the ABS Rules for Building and Classing Steel Vessels – Part 4: Vessel Systems and Machinery were revised to facilitate the IACS UR P2.7.4 Mechanical joint and P2.11 Type approval of mechanical joints requirements.

However, ABS declared a reservation against UR P2.11 (Rev.2/Nov 2001) until such time as Members agree to a uniform implementation date for these requirements. Accordingly, the requirements of 2006 edition of the ABS Rules for Building and Classing Steel Vessels – Part 4: Vessel Systems and Machinery regarding Testing of Mechanical Joints in 4-6-2/5.9.2 and the relevant text in 4-6-2/5.9.1(a) and 4-6-2/Table 12 are withdrawn.

PART 4 VESSEL SYSTEMS AND MACHINERY

CHAPTER 6 PIPING SYSTEMS

SECTION 2 METALLIC PIPING

5 Design

5.9 Mechanical Joints (2006)

5.9.1 Design (Delete last sentence of 4-6-2/5.9.1(a) to read as follows:)

These requirements are applicable to pipe unions, compression couplings and slip-on joints, as shown in 4-6-2/Table 9. The approval is to be based upon the results of testing of the actual joints in association with the following requirements. Mechanical joints similar to those indicated in 4-6-2/Table 9 and complying with these requirements will be specially considered.

5.9.1(a) General (1 March 2006). The application and pressure ratings of mechanical joints are to be approved by the Bureau.

(Remainder of 4-6-2/5.9.1 is unchanged.)

Notice No. 2 – March 2006

2 ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS . 2006

(Delete text of 4-6-2/5.9.2 and replace it with “No Text” as follows:)

5.9.2 Testing of Mechanical Joints <No Text>

(Delete far right column in 4-6-2/Table 12 and revise Notes as follows:)

TABLE 12 Testing Requirements for Mechanical Joints (1 March 2006)

Types of Mechanical Joints Slip-on Joints

Tests Compression Couplings and Pipe Unions

Grip Type & Machine

Grooved Type Slip Type

1 Tightness test Y Y Y 2 Vibration (fatigue) test Y Y N 3 Pressure pulsation test, (1) Y Y N 4 Burst pressure test Y Y Y 5 Pull-out test Y Y N 6 Fire endurance test Y (2) Y Y 7 Vacuum test (3) Y (4) Y Y 8 Repeated assembly test Y (5) Y N

Abbreviations: Y - Test is required

N - Test is not required

Notes: 1 For use in those systems where pressure pulsation other than water hammer is expected.

2 (1 March 2006) If joints are required to be approved fire resistant type in accordance with 4-6-2/Table 10.

3 (1 March 2006) For suction lines only.

4 Except joints with metal-to-metal tightening surfaces.

5 Except press type.