Standards , Specs and Procedures

Frosio course hand-out: Section 16A Standards, specs & procedures

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Frosio 16A Standards, specifications & procedures slide # 1

Standards, specifications and procedures


Standards and coating systems


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SPECIFICATIONSWhy make a specification?

It clarifies what the client shall receive in return for paying the quoted price (expectations)

It states what the contractor will have to do in order to get paid (obligations)

The specification provides a contractual document for all the technical aspects of the operation in order to reduce disputes to a minimum


Who makes the specification?

The owner

The consultant

The management company

The contractor

The paint supplier

They may all have a greater or smaller input to the content in the final specification


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Who decides on the specification?

The final decision is with the one paying the bill!


What should a surface treatment specification contain?

Surface preparation

Paint application

Quality control / equipment

Repair

Safety aspects

Qualification of material and personnel

Documentation / reports


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Surface preparation

Pre blasting preparations

Approved surface preparation methods

Demands of surface cleanliness and roughness

Methods of control / acceptance

Demands of environmental conditions


Quality control

What tests shall be carried out?

What methods are to be used?

What are the acceptance criteria?

Consequences if work is non-conforming?

Comments


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PROCEDURES

ISO 12944:

The part of the document that describes the way the paint work is to be carried out, in conformity with the project specification and the protective paint system specification, as well as with the inspection and assessment specification


Specifications and procedures

Specification

A document stating what we wish to achieve how and at what quality level a certain piece of work must be

carried out

Procedure

A document explaining how we shall achieve the

requirements in a specification Processing instruction, check points, quality control

Procedure Specificationhow (to meet) requirements


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STANDARDS

Refer to:

NS 476:2004, Annex A.5 (page 25)

Corrosion Protection, Inspectors book of reference Chapter 13 (pages 310 to 369)

Appendix to Chapter 13 (pages 370 to 393)


ISO 8501 - 1

Rust grade A, B, C and D

Surface preparation

Standard for deciding rust grades


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Cd-0631-59Cd-0631-58

Cd-0631-57Cd-0631-56

ISO 8501-1 Evaluation of rust grades

Rust grade A

Rust grade D

Rust grade B

Rust grade C


Mill scale on pipes

Corrosion and mill scale, rust grade B

Rust and mill scale must be removed prior to paint application.

Mill scale can be removed by blast-cleaning

Cd-4930-86


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Sa: Blast cleaning (grades 1, 2, 2 and 3)

St.: Hand and power tool cleaning

(grades 2 and 3)

Fl: Flame cleaning (one grade)

ISO 8501 - 1

Standard for deciding preparation grades


ISO 8501-1

Hand and Power Tool Cleaning (St)

St 2 Thorough hand and power tool cleaning.

When viewed without magnification, the surface shall be free from visible oil, grease and dirt, and poorly adhering mill scale, rust, paint coatings and foreign matter.

St 3 Very thorough hand and power tool cleaning.

As for St 2, but the surface shall be treated much more thoroughly to give a metallic sheen arising from the metallic substrate.


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ISO 8501-1

Abrasive Blast Cleaning (Sa)

Sa 1 Light blast cleaning

When viewed without magnification, the surface shall be free from visible

oil, grease and dirt and from poorly adhering mill scale, rust, paint

coatings and foreign matter.

Sa 2 Thorough blast cleaning


oil, grease and dirt and from most of the mill scale, rust, paint coatings

and foreign matter. Any residual contamination shall be firmly adhering.


ISO 8501-1

Abrasive Blast Cleaning (Sa)

Sa 2 Very thorough blast cleaning.


oil, grease and dirt and from poorly adhering mill scale, rust, paint coatings and foreign matter. Any remaining traces of contamination shall show only as slight stains in the form of spots or stripes.

Sa 3 Blast cleaning to visually clean steel.

When viewed without magnification, the surface shall be free from visible oil, grease and dirt, and shall be free from mill scale, rust, paint coatings

and foreign matter. It shall have a uniform metallic colour.


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0631-554932-76

ISO 8501 - 1Standard for deciding preparation grades

Left: Blast standard agreement

Right: Hand tooling of C steel to St 2


ISO 8501 - 2

Surface preparation

As for ISO 8501-1, but:

For steel where previous coating has been removed locally, not completely.


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PSa : Localised blast cleaning

(grades 2, 2 and 3)

PSt : Localised hand and power tool cleaning

(grades 2 and 3)

PMa : Localised machine abrading (one grade)

ISO 8501 - 2 Standard for deciding preparation grades


ISO 8501 - 3

Surface preparation. Design

Visual assessment of surface design

Preparation grades of welds, cut edges and surface imperfections.


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Waterjetting

ISO 8501-4 Preparation grades of coated and uncoated steel substrates after removal of rust and previous coatings by hugh=pressure water-jetting

Photographic standard in progress, showing grades DC A, DC B, DC C1, DC C2, DC D

SSPC VIS-4 Guide and Reference Photographs for Steel Surfaces prepared by waterjetting.

WJ 1 Surface free of all rust, coatings, mill scale and foreign matter.

WJ 2 95% removed.

WJ 3 Two thirds removed.

WJ 4 All loose rust, mill scale and coatings removed.


ISO 8502

Assessment of surface cleanliness (1 of 2)

Part 1 Field test for soluble iron corrosion products

Part 2 Laboratory determination of chloride on cleaned surfaces.

Part 3 Assessment of dust on steel surfaces prepared for painting (pressure- sensitive tape method)

Part 4 Guidance on the estimation of the probability of condensation prior to paint application.

Part 5 Measurement of chloride on steel surfaces prepared for painting. Ion detector tube method.


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ISO 8502

Assessment of surface cleanliness (2 of 2)

Part 6 Extraction of soluble contaminants for analysis.

The Bresle method.

Part 9 Conductometric measurements of soluble salts


Approved

Not approved

Tape Blast cleaned steel

ISO 8502-3

Assessment of dust

Steel Surfaces Prepared for Painting.


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1. Quantity ratings 1, 2, 3, 4 and 5 corresponding to pictorial references

2. Dust size classes 0, 1, 2, 3, 4 and 5

ISO 8502 - 3

Assessment of dust

Assessment of dust on steel surface prepared for painting


ISO 8502 - 3Assessment of dust

Left: Dust on steel beam

Right: Control of dust according to standard

0866-130866-14


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ISO 8502 - 3

Assessment of dust

Assessment of dust on steel

surface prepared for painting

1. Quantity ratings 1, 2, 3, 4

and 5 corresponding to

pictorial references

2. Dust size classes:

0, 1, 2, 3, 4 and 5

Inspection / Dust_control1


ISO 8503

Surface roughness of blast-cleaned steel

Part 1

Specifications and definitions for ISO surface

profile comparatives for the assessment of

abrasive blast-cleaned surfaces.

Part 2Method for the grading of surface profile of abrasive

blast- cleaned steel - Comparator procedure.

Part 3

Method for the calibration of ISO surface profile

comparators and for the determination of surface

profile- Focusing microscope procedure.

Part 4

Method for the calibration of ISO surface profile

comparators and for the determination of

surface profile - Stylus instrument procedure


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ISO 8503 Surface roughness

Example of a reference comparator

Surface profile comparator comprising four segments.

Grit (G)

Shot (S)

Check if the profile is according to specification and the paint manufacturers recommendation

Cd-4932-86


ISO 8503 - 1

Limits of profile grades

a) Comparators for steel. Blast-cleaned with grit abrasives

Fine (G)Profiles equal to segment 1 and up to,

but excluding segment 2 (25-50 micr)

Profiles equal to segment 2 and up to,




Medium (G)

Coarse (G)

b) Comparators for steel. Blast-cleaned with shot abrasives

Fine (S)

Medium (S)

Coarse (S)








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ISO 8503 - 1

Nominal values and tolerances

a) Comparators for steel, blast-cleaned with grit abrasives

Segment Nominal reading m

Tolerancem

1 25 32 60 103 100 154 150 20

b) Comparators for steel, blast-cleaned with shot abrasives

Segment Nominal reading m

Tolerancem

1 25 32 40 53 70 104 100 15


Ry the maximum peak-to-valley height occuring over a sampling length


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Ry the maximum peak-to-valley height occuring over a sampling length


Ra average roughness

Ra = the mean distance of all points on the profile to the centre line

Centre line


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ISO 12944

General standard for corrosion protection:

Part 1 General introduction.

Part 2 Classification of environments.

Part 3 Design considerations.

Part 4 Types of surface and surface preparation.

Part 5 Protective paint systems.

Part 6 Laboratory performance test methods.

Part 7 Execution and supervision of paint work.

Part 8 Development of specifications for new work and maintenance.

Paints and varnishes - Corrosion protection

of steel structures by protective paints systems.


ISO 12944, CORROSION CLASSES


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ISO 12944, CORROSION CLASSES



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Checklist for coating selection


ISO 12944, SYSTEM EXAMPLES


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ISO 12944, SYSTEM EXAMPLES


Specifications for metallic blast-cleaning abrasives.

The standard consists of 5 parts

Part 1 Introduction

Part 2 Chilled iron grit

Part 3 High carbon cast steel shot and grit

Part 4 Low carbon cast steel shot

Part 5 Cut steel wire

ISO 11124

Content of the standard


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ISO 11125

Content of the standardMethods of test for metallic blast-cleaning abrasives.

The standard consists of 8 parts

Part 1 Sampling

Part 2 Determination of particle size distribution

Part 3 Determination of hardness

Part 4 Determination of apparent density

Part 5 Determination of defective particles

and microstructure

Part 6 Determination of matter

Part 7 Determination of moisture

Part 8 Abrasive mechanical properties


Specification for non-metallic blast-cleaning abrasive. The standard consists of 10 parts

Part 1 Introduction

Part 2 Silica sand

Part 3 Copper refinery slagPart 4 Coal furnace slag

Part 5 Nickel refinery slag

Part 6 Iron furnace slagPart 7 Fused aluminium oxide

Part 8 Olivine sand

Part 9 Staurolite

Part 10 Garnet

ISO 11126



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ISO 11127


Test methods for non-metallic blast-cleaning abrasives.The standard consists of 8 parts

Part 1 Sampling

Part 2 Determination of particle size distribution

Part 3 Determination of apparent density

Part 4 Determination of hardness by a glass slide test

Part 5 Determination of moisture content

Part 6 Determination of water soluble

contamination by conductive measurement

Part 7 Determination of water soluble chlorides

Part 8 Abrasive mechanical properties


Contamination of abrasives

Water

Oil and grease

Chlorides

Sulphates

The abrasives can be contaminated with:


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ISO 11127 - 5

Content of humidity of the abrasives

Laboratory test

Requirement: Maximum 0.2 %


ISO 11127 - 6

Content of water soluble contaminants

A sample of 100 g. of the abrasives

100 ml of water

Shake for 5 minutes and let rest for 1 hour

Shake again for another 5 minutes

Measure the conductivity at a temperature of 10 oC

Conductivity measurements

Requirement: Maximum conductivity of 25 mS/m


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According to ASTM D 4940

Mix 300 ml of abrasive and 300 ml water

Stir for 1 min. let stand for 8 min., stir again for 1 min.

Oil content (AB-1)

No presence of oil,

either on top or as an

emulsion after 30 min.

How to check the abrasives

Conductivity (AB-1)

Fill the liquid for test

and measure the

conductivity.

Max 25 mS/m


Is the abrasive free from oil and grease ?

Put a handful of the abrasives into a beaker

Pour clean, fresh water into the beaker

Shake the mixture

A film of oil will form on top of the water if oil or grease are present

This is of particular importance to

check when abrasives are recycled


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Is the abrasive free from oil and grease ?

ASTM D 4940

Put a handful of the abrasives into a beaker

Pour clean, fresh water into the beaker

Shake the mixture

A film of oil will form on top of the water if oil or grease are present

Shopprimer/ Abrasive_test1


Method 1:

Method 2:

Method 3:

Method 4:

Method 5:

Determination of wet film thickness.

Determination of dry-film thickness by calculation from mass

Measurement of dry-film thickness by mechanically contacting method

Measurement of dry-film thickness by the profilometer method

Measurement of dry-film thickness using microscope method

ISO 2808 - 97

Determination of film thickness (1 of 2)


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Method 6:

Method 7:

Method 8:

Method 9:

Method 10:

Magnetic method

Eddy current method

Non-contact methods

Gravimetric method (dissolving methods)

Determination of dry-film thickness on blast-cleaned steel substrates

ISO 2808 - 97

Determination of film thickness: (2 of 2)


ISO 4628

Evaluation of degradation of paint coatings

Designation of intensity, quantity and size of common types of defect


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ISO 4628

Content of the Standard

Part 1 General principles and rating schemes

Part 2 Designation of degree of blistering

Part 3 Designation of degree of rusting

Part 4 Designation of degree of cracking

Part 5 Designation of degree of flaking

Part 6 Designation of degree of chalking

The standard consists of six parts


ISO 4628 / 1General principles and rating schemes

Uniform deterioration.

Rating scheme for designation the intensity of deterioration

consisting of a uniform change in the

visual appearance of the paint coating.

Rating Intensity of change

0

1

2

3

4

5

unchanged, i.e. no perceptible change

very slight, i.e. just perceptible change

slight i.e. clearly perceptible change

moderate, i.e. very clearly perceptible change

considerable, i.e. pronounced change

severe, i.e. intense change


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ISO 4628 / 1

General principles and rating schemesScattered defects.

Rating scheme for designating the quantity of defects consisting

of discontinuities or other local imperfections of the paint coating.

RatingQuantity of defects

(relative to a test surface area of 1 to 2 dm)

0

1

2

3

4

5

none, i.e. no detectable defects

very few, i.e. some just significant defects

few, i.e. small but significant amount of defects

Moderate, i.e. medium amount of defects

considerable, i.e. serious amount of defects

dense, i.e. dense pattern of defects


ISO 4628 / 1

General principles and rating schemes

Rating scheme for designating

the size (order of magnitude) of defects

Class Size of defect

0

1

2

3

4

5

not visible under 10 X magnification

only visible under magnification up to 10 X

just visible with normal corrected vision

clearly visible with normal corrected vision (up to 0,5 mm)

range 0,5 to 5 mm

larger than 5 mm


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ISO 4628 / 1

Test report

The test report shall contain at least the following information:

a) the type and identification of the product tested

b) a reference to this International Standard (ISO 4628/1)

c) the type of defect

d) the intensity of the defect (table 1) or,

e) the quantity of the defect (table 2)

f) the rating, if any, of the size of the defect in brackets preceded by the letter S.

Examples: cratering of top coat : 2 (S3)

whitening : 4

rivelling : 3 (S2)


ISO 4628 / 3Designation of degree of rusting

Rating

Designate the degree of rust formation by reference to the pictorial standards

Degree Area rusted %

Ri 0

Ri 1

Ri 2

Ri 3

Ri 4

Ri 5

0

0,05

0,5

1

8

40/50


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Assessment of area ratio for coating breakdown

0.1 %

.

..

...

..

..

1.0 %

10 %

30 %

3.0 %

20 %


Standards and coating systems

This NORSOK standard is developed with broad petroleum industry participation by interested parties in the Norwegian petroleum industry and is owned by the Norwegian petroleum industry represented by The Norwegian Oil Industry Association (OLF) and Federation of Norwegian Manufacturing Industries (TBL). Please note that whilst every effort has been made to ensure the accuracy of this NORSOK standard, neither OLF nor TBL or any of their members will assume liability for any use thereof. Standards Norway is responsible for the administration and publication of this NORSOK standard. Standards Norway Telephone: + 47 67 83 86 00 Strandveien 18, P.O. Box 242 Fax: + 47 67 83 86 01 N-1326 Lysaker Email: [email protected] Website: www.standard.no/petroleumCopyrights reserved

NORSOK STANDARD M-501Rev. 5, June 2004

Surface preparation and protective coating

Documents

Standards , Specs and Procedures