1、 ABSRULES FOR BUILDING AND CLASSING HIGH-SPEED CRAFT .2013 1 RULES FOR BUILDING AND CLASSING HIGH-SPEED CRAFT 2013 NOTICE NO. 1 July 2013 The following Rule Changes were approved by the ABS Rules Committee on 31 May 2013 and become EFFECTIVE AS OF 1 JULY 2013. (See http:/www.eagle.org for the consol
2、idated version of the Rules for Building and Classing High-Speed Craft 2013, 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. (Se
3、e 1-1-4/3.3 of the ABS Rules for Conditions of Classification High-Speed Craft (Part 1).) PART 3 HULL CONSTRUCTION AND EQUIPMENT CHAPTER 7 TESTING, TRIALS AND SURVEYS DURING CONSTRUCTION HULL SECTION 1 TANK, BULKHEAD AND RUDDER TIGHTNESS TESTING (Revise Subsection 3-7-1/1, as follows:) 1 General (1
4、July 2013) Test procedures are to confirm the watertightness of tanks and watertight boundaries, the structural adequacy of tanks and the weathertightness of structures/shipboard outfitting. The tightness of tanks and tight boundaries is to be confirmed by test procedures for: New craft, prior to de
5、livery, and Structures involved in or affected by major conversions or repairs affecting structural integrity 1.1 Application All gravity tanks which are subjected to vapor pressure not greater than 0.7 bars (0.7 kgf/cm2, 10 psi) and other boundaries required to be watertight or weathertight are to
6、be tested in accordance with this Subsection and proven tight or structurally adequate as follows: 1.1.1 Gravity Tanks for their structural adequacy and tightness, 1.1.2 Watertight Boundaries Other Than Tank Boundaries for their watertightness, and 1.1.3 Weathertight Boundaries for their weathertigh
7、tness. Testing of structures not listed in 3-7-1/Table 1 is to be specially considered. Notice No. 1 July 2013 2 ABSRULES FOR BUILDING AND CLASSING HIGH-SPEED CRAFT .2013 1.3 Types and Definitions of Test The following two types of testing are specified in this requirement. 1.3.1 Structural Testing
8、is a test to verify the structural adequacy of the construction of the tank. This may be hydropneumatic testing or hydrostatic testing as specified in 3-7-1/5.1 and 3-7-1/5.3. 1.3.2 Leak Testing is a test to verify the tightness of the boundary. Unless specific testing is indicated, this may be hydr
9、ostatic/hydropneumatic testing or air testing as specified in 3-7-1/5.1, 3-7-1/5.3 and 3-7-1/5.5. Leak testing in items 14 to 17 as specified in 3-7-1/Table 1 includes hose test as an acceptable medium of the test. 3 Test Procedures (Revise Paragraph 3-7-1/3.3, as follows:) 3.3 Structural Testing (1
10、 July 2013) 3.3.1 Test Type and Time Where structural testing is specified by 3-7-1/Table 1, hydrostatic testing in accordance with 3-7-1/5.1 will be acceptable, except where practical limitations (strength of building berth, density of liquid, etc.) prevent it or where air testing is permitted by N
11、ote 1 to 3-7-1/Table 1. Hydropneumatic testing, in accordance with 3-7-1/5.3, may be approved in lieu of hydrostatic testing. Structural testing may be carried out after the craft is launched. Tank boundaries are to be tested at least from one side. Tanks to be tested for structural adequacy (see No
12、te 1 to 3-7-1/Table 1) are to be selected so that all representative structural members are tested for the expected tension and compression. 3.3.2 Number of Structural Testing i) Structural testing is to be carried out for at least one tank of the same construction (i.e. tanks of the same structural
13、 design and configuration and same general workmanship as determined by the attending Surveyor) on each craft provided all subsequent tanks are tested for leaks by an air test. The relaxation to accept leak testing using an air test instead of a structural test does not apply to cargo space boundari
14、es in tankers and combination carriers and tanks for segregated cargoes or pollutants. However, where structural adequacy of a tank was verified by structural testing required in 3-7-1/Table 1, the subsequent craft in the series (i.e. sister ships built in the same shipyard) may be exempted from suc
15、h testing for other tanks which have the structural similarity to the tested tank, provided that the water-tightness in all boundaries of exempted tanks are verified by leak tests and thorough inspection. For sister ships built several years after the last ship of the series, such exemption may be r
16、econsidered. In any case, structural testing is to be carried out for at least one tank for each craft in order to verify structural fabrication adequacy. The relaxation to accept leak testing and thorough inspections instead of a structural test on subsequent craft in the series does not apply to c
17、argo space boundaries in tankers and combination carriers and tanks for segregated cargoes or pollutants. ii) For watertight boundaries of spaces other than tanks (excluding chain lockers), structural testing may be exempted, provided that the watertightness in all boundaries of exempted spaces are
18、verified by leak tests and thorough inspection. iii) These subsequent tanks may require structural testing if found necessary after the structural testing of the first tank. iv) Tanks for structural test are to be selected so that all representative structural members are tested for the expected ten
19、sion and compression. Notice No. 1 July 2013 ABSRULES FOR BUILDING AND CLASSING HIGH-SPEED CRAFT .2013 3 (Replace existing Paragraphs 3-7-1/3.5 and 3-7-1/3.7 with the following:) 3.5 Leak Testing (1 July 2013) For leak testing specified in 3-7-1/Table 1, air testing, compressed air fillet weld testi
20、ng, vacuum box testing in accordance with 3-7-1/5.5, 3-7-1/5.9, and 3-7-1/5.11, or their combination will be acceptable. Hydrostatic or hydropneumatic testing may also be accepted as leak testing provided 3-7-1/5.1 and 3-7-1/5.3 are complied with. Hose testing is applied to structures not subjected
21、to structural or air testing but required to be watertight or weathertight as specified in 3-7-1/Table 1. For the details of hose testing, see 3-7-1/5.7. Air testing or structural testing may be accepted in lieu of hose testing. Joint air testing may be carried out in the block stage provided all wo
22、rk on the block that may affect the tightness of the joint is completed before the test. See also 3-7-1/7.1 for the application of final coating and 3-7-1/7.5 for safe access to the joint and their summary in 3-7-1/Table 2. (Revise Subsection 3-7-1/5, as follows:) 5 Details of Testing (1 July 2013)
23、5.1 Hydrostatic Testing Hydrostatic Testing is a test to verify the structural adequacy of the design and the tightness of the tanks structure by means of water pressure. Hydrostatic testing is the normal means for structural testing with exception as per 3-7-1/3.3. Hydrostatic testing is to consist
24、 of a head of water to the level specified in 3-7-1/Table 1. 5.3 Hydropneumatic Testing Hydropneumatic Testing is a combined hydrostatic and air testing wherein a tank is filled by water with air pressure applied on top. When approved, the combined water level and air pressure used for hydropneumati
25、c testing is to simulate the actual loading as far as practicable. The requirements and recommendations in 3-7-1/5.5 relative to air pressure will also apply. 5.5 Air Testing Air Testing is a test to verify the tightness of the structure by means of air pressure difference. All boundary welds, erect
26、ion joints, and penetrations including pipe connections are to be examined in accordance with the approved procedure and under a pressure differential not less than 0.15 bar (0.15 kgf/cm2, 2.2 psi) with a leak indicating solution. It is recommended that the air pressure in the tank be raised to and
27、maintained at 0.20 bar (0.20 kgf/cm2, 2.9 psi) for approximately one hour, with a minimum number of personnel around the tank, before being lowered to the test pressure. A U-tube with a height sufficient to hold a head of water corresponding to the required test pressure is to be arranged. The cross
28、 sectional area of the U-tube is to be not less than that of the pipe supplying air. In addition to the U-tube, a master gauge or other approved means is to be provided to verify the pressure. Other effective methods of air testing, including compressed air fillet weld testing or vacuum testing, may
29、 be considered in accordance with 3-7-1/5.9. 5.7 Hose Testing Hose Testing is a test to verify the tightness of the joint by a jet of water. Hose testing is to be carried out with the pressure in the hose of at least 2 bar (2 kgf/cm2, 30 psi) during test. The nozzle is to have minimum inside diamete
30、r of 12 mm (0.5 in.) and is to be located at a distance to the joint not exceeding 1.5 m (5 ft). For structural welds, where hose testing is not practical because of possible damage to machinery, electrical equipment insulation or outfitting items, it may be replaced by a careful visual examination
31、of welded connections, supported where necessary by means such as penetration testing, ultrasonic testing, or an equivalent. Notice No. 1 July 2013 4 ABSRULES FOR BUILDING AND CLASSING HIGH-SPEED CRAFT .2013 For cable penetrations, where hose testing is not practical because of possible damage to ma
32、chinery, electrical equipment insulation or outfitting items, other methods of testing may be considered upon submission of full particulars to the attending Surveyor. 5.9 Compressed Air Fillet Weld Testing Compressed Air Fillet Weld Testing is an air test of a fillet welded tee joint with a leak in
33、dicating solution applied on the fillet welds. In this air testing, compressed air is injected from one end of fillet welded joint and the pressure verified at the other end of the joint by a pressure gauge on the opposite side. Pressure gauges are to be arranged so that an air pressure of at least
34、0.15 bar (0.15 kgf/cm2, 2.2 psi) can be verified at each end of all passages within the portion being tested. Where a leaking test of partial penetration welding is required and the root face is sufficiently large such as 6-8 mm (0.24-0.32 inch), the compressed air test is to be applied in the same
35、manner as for a fillet weld. 5.11 Vacuum Box Testing Vacuum Box Testing is a test to detect any leaks on the structure. A box over a joint with leak indicating solution applied on the fillet or full penetration welds. A vacuum is created inside the box to detect any leaks. A box (vacuum tester) with
36、 air connections, gauges and inspection window is placed over the joint with leak indicator applied. The air within the box is removed by an ejector to create a vacuum of 0.20 bar (0.20 kgf/cm2, 2.9 psi) 0.26 bar (0.27 kgf/cm2, 3.8 psi) inside the box. 5.13 Ultrasonic Testing Ultrasonic Testing is a
37、 test to verify the tightness of a sealing by means of ultrasound. An arrangement of an ultrasonic echoes transmitter placed inside a compartment and a receiver outside. A location where the sound is detectable by the receiver displays a leakage in the sealing of the compartment. 5.15 Penetration Te
38、sting Penetration Testing is a test to verify that no leakage exist in the boundaries of a compartment by the application of low surface tension liquids. A test of butt welds by applying a low surface tension liquid to one side of a compartment boundary. When no liquid is detected on the opposite si
39、de of the boundary after expiration of a definite time, verification of the tightness of the compartment boundary can be assumed. 5.17 Other Methods of Testing Other methods of testing may be considered upon submission of full particulars. 7 Application of Coating (Revise Paragraph 3-7-1/7.1, as fol
40、lows:) 7.1 Final Coating (1 July 2013) 7.1.1 Structural Testing For all weld joint types excluding butt joints by automatic process, final coating may be applied prior to the structural testing. See 3-7-1/Table 2. 7.1.2 LeakTesting For all manual or semi-automatic erection welds and all fillet weld
41、tank boundary connections including penetrations, the final coating is to be applied after leak testing. For other welds, the final coating may be applied prior to leak testing, provided the Surveyor, after examination prior to the application of the coating, is satisfied with the weld. The Surveyor
42、 reserves the right to require leak testing prior to the final coating of automatic erection welds and manual or automatic pre-erection welds. See 3-7-1/Table 2. Notice No. 1 July 2013 ABSRULES FOR BUILDING AND CLASSING HIGH-SPEED CRAFT .2013 5 (Add new Paragraph 3-7-1/7.5, as follows:) 7.5 Safe Acc
43、ess to Joints (1 July 2013) For leak testing, a safe access to all joints under examination is to be provided. See 3-7-1/Table 2. (Replace existing 3-7-1/Table 1 with the following:) TABLE 1 Testing Requirements for Tanks and Boundaries (1 July 2013) Tank or Boundary to be Tested Test Type Test Head
44、 or Pressure Remarks 1 Double bottom tanks(4)Leak & Structural(1)The greater of - top of the overflow, - to 2.4 m (8 ft) above top of tank (2), or - to bulkhead deck 2 Double bottom voids(5)Leak See 3-7-1/5.5, 3-7-1/.5.9, and 3-7-1/ 5.11, as applicable 3 Double side tanks Leak & Structural(1)The gre
45、ater of - top of the overflow, - to 2.4 m (8 ft) above top of tank (2), or- to bulkhead deck 4 Double side voids Leak See 3-7-1/5.5, 3-7-1/.5.9, and 3-7-1/ 5.11, as applicable 5 Deep tanks other than those listed elsewhere in this table Leak & Structural(1)The greater of - top of the overflow, or -
46、to 2.4 m (8 ft) above top of tank (2)6 Cargo oil tanks Leak & Structural(1)The greater of - top of the overflow, - to 2.4 m (8 ft) above top of tank (2), or - to top of tank (2)plus setting of any pressure relief valve 7 Ballast hold of bulk carriers Leak & Structural(1)The greater of - top of the o
47、verflow, or - top of cargo hatch coaming See item 16 for hatch covers. 8 Peak tanks Leak & Structural(1)The greater of - top of the overflow, or - to 2.4 m (8 ft) above top of tank (2)After peak to be tested after installation of stern tube 9 a. Fore peak voids Leak See 3-7-1/5.5, 3-7-1/.5.9, and 3-
48、7-1/ 5.11, as applicable b. Aft peak voids Leak See 3-7-1/5.5, 3-7-1/.5.9, and 3-7-1/ 5.11, as applicable After peak to be tested after installation of stern tube 10 Cofferdams Leak See 3-7-1/5.5, 3-7-1/.5.9, and 3-7-1/ 5.11, as applicable 11 a. Watertight bulkheads Leak See 3-7-1/5.5 through 3-7-1/
49、5.11 as applicable (7)b. Superstructure end bulkhead Leak See 3-7-1/5.5 through 3-7-1/5.11 as applicable c. Cable penetrations in watertight bulkheads Hose See 3-7-1/5.7 Notice No. 1 July 2013 6 ABSRULES FOR BUILDING AND CLASSING HIGH-SPEED CRAFT .2013 12 Watertight doors below freeboard or bulkhead deck Leak (6, 8)See 3-7-1/5.5 through 3-7-1/5.11 as applicable See 3-2-9/9.11 of the Steel Vessel Rules for additional test at the manufacturer. 13 Double plate rudder blade Leak See 3-7-1/5.5 through 3-7-1/5.11 as applicable 14 Shaft tunnel clear of deep tanks Leak (3)See 3
