Basics of DNV Certification

Nishank Bhanu and Vibhor Sahay17 February 2010

Certification of Materials and ComponentsDNV Ratnagiri site team

© Det Norske Veritas AS. All rights reserved.

Basics of DNV certification

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Agenda Objective

Why certification required?

Different type of certificates

DNV Rule reference

Some examples

Quick references

DNV’s standard form numbers

Certificates based in DNV’s scope of work: Example

Role of an engineer working at site/Onboard

Questions and comments

- Objective - DNV’s certification principle1.Different types of certificates issued by

DNV2.Different type of certificates acceptable

to DNV3.DNV rule requirement toward

certification4.Product certification5.Type approval6.Material certification



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Why Certification required ?- The objective of the certification is to

ensure that materials, components and systems used in ships to be classed by the Society conform to the rules and other standards within the framework of the rules.

- The certification is a conformity assessment normally including both design and production assessment.



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Different type of certificatesMaterial certificates- DNV product certificate: Approval of Manufacturer- Manufacturer Works certificate: Approval of Manufacturer- Test reports

Type approval : Design assessment + Prototype testing: Valid for 4 years

Case by case approval: One time design assessment

Equipment certification - Type approval + Workshop testing of the product itself: Engines, Air receivers etc.- Material certificate + Testing at manufacturers premises: For eg. Valves>100 NB

Marine equipment certificates (MED certificates)

Products approved by National authorities (For e.g. MMD)



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Few examples



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What do they mean? According to DNV Rules :

Det Norske Veritas Product Certificate (NV):A document signed by a surveyor of the Society stating:

— conformity with rule requirements

— that tests are carried out on the certified product itself

— that tests are made on samples taken from the certified product itself

— that tests are performed in presence of the surveyor or in accordance with special agreements.

— Manufacturer is approved by DNV under DNV’s approval of manufacturer program (For material certification)

Works Certificate (W): A document signed by the manufacturer stating:


— that tests are carried out on the certified product itself

— that tests are made on samples taken from the certified product itself

— that tests are witnessed and signed by a qualified department of the manufacturers.

—Manufacturer is approved by DNV under DNV’s approval of manufacturer program (For material certification)

Test Report (TR): A document signed by the manufacturer stating:


— that tests are carried out on samples from the current production.



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Material/Equipment traceabilityFor identification and traceability, certified products are to be stamped in accordance with the marking given in the product certificate and as specified by the applicable chapters of the rules.



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Certification for Plates and Pipes:Part 2 Chapter 2 Section 1 :A 300 Manufacture

301 All materials delivered with NV or works certificate shall be made at works approved by the Society for the type and grade of steel being supplied and for the relevant steelmaking and processing route. Rolling mills without own steelmaking may only use starting material supplied by works approved by the Society.



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Certification required for electrical equipments



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Shafting: DNV rules pt.4 Ch.4 Sec 1



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Required certificatesMain engine: Type approval + Product certificate

Air receivers: Type approval/Design assessment+ Product certificate

Electrical cables: Type approval certificate

Rudder: Product certificate

Pipes : Product certificate (NV)/ Works certificate (W) / Test reports

Thrusters : Product certificate

Air vent heads: Type approval

Fire insulation: Type approval

Cement tanks : Class II pressure vessels: Manufactured by approved manufacturer

Pumps: According to list given in DNV rules Pt 4 Ch6 Sec 6 B101

Etc.



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Certification of other components:The requirement of component’s certification is generally mentioned at the starting pages of the relevant and corresponding chapter in DNV Rules.

For example:

Steering gear :

Part 3 Chapter 3 Section 2

B 400 Material certificates

401 «Det Norske Veritas Product Certificate» (NV) will berequired for:— sternframe structural parts— rudder structural parts— rudder shaft or pintles— rudder stock— rudder carrier— bolts for flanged couplings.

402 “Works certificate” (W) will be accepted for:— bolts— stoppers.



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Pump Certification: DNV rules Pt.4 Ch.6 Sec 6101 The following pumps shall be delivered with the Society's certificate:

— sea-water cooling pumps for main engine— fresh-water cooling pumps for main engine— main condenser circulating pumps— condensate pumps for main condenser— air pumps for main condenser— feed-water pumps— circulating pumps for boilers with forced circulation— fuel oil transfer pumps and booster pumps— fuel oil service pumps— fuel injection valve cooling pumps— lubricating oil pumps for main engine and main reduction gear— bilge pumps— ballast pumps— fire pumps and emergency fire pumps— hydraulic pumps for steering gears, windlasses, variable pitch propellers, side thrusters, cargo pumps and hydraulically

operated valves— cargo pumps (cargo pumps for non-flammable liquids on offshore supply vessels need not be delivered with the Society's

certificate)— inert gas cooling water pumps— circulation pumps for thermal-oil— other pumps considered necessary for performing of the main functions listed in Pt.1 Ch.1 Sec.1 A200.



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Certificates of components: DNV standard form numbers70.41a: Certificate for windlass

71.61a: Certificate for gear transmission(s)

71.9a: Certificate for propeller(s)

40.91a: Certificate for controllable pitch propeller

74.00a: Certificate for boiler(s)

70.3a: Certificate for steering gear(s)

71.71a: Certificate for thruster(s)

74.03a: Certificate for welded pressure vessel(s)

79.35a: Certificate for air compressor(s)

79.40a: Certificate(s) for electric generator(s)

72.00a: Certificate for diesel engine(S)



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Type approval required forPipe couplings

Electrical cables

Resin chockfast (For e.g. Orange chockfast)

Vibracon Elements

Watertight doors

GRP doors

Fire insulation

Etc.



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Special cases: Type of certification according to DNV scope of work

CRANES- CRANE class notation or ILO 152

certification by DNV.

A-0 windows- FIFI (Fire fighter) class notation



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FAQSEquipment/ Material certified by another IACS member society ?

MED certification

National authority approvals

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Safeguarding life, property and the environment

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Basics of DNV Certification

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