Mechanical joints defined in 4-6-2/5.9.1 including compression couplings and slip-on joints of different types for marine use are to be certified in accordance with 4-6-2/Table 10. The approval is to be based upon the type testing specified in 4-6-2/5.9.1(j) and Table 12, as required for the service conditions and intended application. ABS may specify more severe testing conditions and additional tests if considered necessary to ensure the intended reliability and also accept alternative testing in accordance with national or international standards where applicable to the intended use and application. Details of testing procedures and requirements are described in 4-6-2/5.9.2 of the Steel Vessel Rules. Mechanical joints may be Type Approved, see 1-1-A3/1 of the ABS Rules for Conditions of Classification (Part 1) for general requirements for Type Approval Certification.