SSPC-AB-2-2016 回收铁质金属磨料清洁度

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SSPC-AB 2

March 2, 2015

Editorial Revision February 15, 2016

1. Scope

1.1 This standard contains requirements for the cleanliness

of recycled ferrous metallic blast cleaning abrasives (the “work

mix”) used for the removal of coatings, paints, scale, rust and

other foreign matter from steel or other surfaces. Laboratory

and eld testing procedures to determine conformance to the

requirements of the standard are also included.

2. Description

2.1 FERROUS METALLIC ABRASIVES: Ferrous metallic

abrasives are used for blast cleaning steel and other surfaces

in eld and shop locations. The inherent value of ferrous

metallic abrasives is their ability to be recycled many times.

The recycled abrasive must be cleaned to remove abrasive

nes and debris, including paint, rust, mill scale, and other

contaminants generated during the blast cleaning of steel or

other surfaces.

2.2 RECYCLED ABRASIVE WORK MIX: The work mix

develops during blast cleaning and recycling and is composed

of new media and, recycled clean media that meets the

requirements of Sections 4.1 through 4.6 of this standard. The

new abrasive being added may consist of shot, grit, or a mix

of shot and grit.

3. Referenced Standards

3.1 The latest issue, revision, or amendment of the

referenced standards in effect on the date of invitation to bid

shall govern, unless otherwise specied.

3.1.1 If there is a conict between the requirements of

any of the cited referenced standards and this standard, the

require ments of this standard shall prevail.

3.2 SSPC: THE SOCIETY FOR PROTECTIVE

COATINGS STANDARD

PA 17 Procedure for Determining Conformance

to Steel Prole/Surface Roughness/ Peak

Count Requirements

3.3 AMERICAN SOCIETY FOR TESTING AND

MATERIALS (ASTM) STANDARDS:1

D3335 Test Method for Low Concentrations of

Lead, Cadmium and Cobalt in Paint by

Atomic Absorption Spectroscopy

D4940 Test Method for Conductimetric Analysis

of Water Soluble Ionic Contaminants of

Blasting Abrasives

D7393 Standard Practice for Indicating Oil in

Abrasives

4. Requirements for Recycled Work Mix Abrasives

4.1 Unless otherwise specied, the recycled work mix shall

meet the requirements of Sections 4.2 through 4.6 prior to rst

use at each jobsite. The work mix shall meet the requirements

of Sections 4.4, 4.5, and 4.6 when tested thereafter at

12-hour intervals or once per work shift, whichever is shorter.

Nonconforming work mix shall not be used, shall be removed

from equipment and shall be disposed of in accordance with

federal, state, and local regulations and project specication

requirements (see Notes 6.1, 6.2 and 6.3).

4.2 The abrasive material as supplied shall comply with

all applicable Federal, state/provincial and local regulations.

Material Safety Data Sheets shall be furnished for all abrasive

materials supplied (see Note 6.4).

4.3 LEAD CONTENT: The maximum lead content of

the work mix shall be 0.1% by weight (1000 parts per million

[ppm]). Collect a single random sample of approximately 115

grams [g] (1/4 pound [lb]) of the work mix for testing according

to requirements of ASTM D3335.

4.4 WATER-SOLUBLE CONTAMINANTS: A single

random sample of approximately 300 milliliters (10 uid

ounces) of cleaned work mix shall be tested for conductivity

in accordance with ASTM D4940. The conductivity of the

abrasive work mix shall not exceed 1000 micromhos/cm

(1 mho = 1 siemen). The test shall be performed once every

12 hours or once every work shift, whichever period is shorter

(see Notes 6.2 and 6.3).

1 ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. For

referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM

Customer Service at service@astm.org. For Annual Book of ASTM Standards volume infor-

mation, refer to the standard’s Document Summary page on the ASTM website.

SSPC: The Society for Protective Coatings

ABRASIVE STANDARD NO. 2

Cleanliness of Recycled Ferrous Metallic Abrasives

SSPC-AB 2

March 2, 2015

Editorial Revision February 15, 2016

4.5 OIL CONTENT: A single random sample of the abrasive

work mix shall be tested in accordance with ASTM D7393.

There shall be no evidence of oil in the water used for the test,

either on the surface or as an emulsion. The test results shall

be reported; however since the test is being performed on a

recycled work mix, reporting the abrasive manufacturer and

batch/lot number, and size designation as required by ASTM

D7393 is not a requirement of SSPC-AB 2.

4.6 PARTICLE SIZE DISTRIBUTION: The particle

size distribution of the clean work mix shall be capable of

achieving and maintaining the prole within the specied

range as determined by the procedure in SSPC-PA 17. (See

Note 6.5 and subsections and Appendix A for examples of

specication language for optional tests that may be used to

assess the particle size distribution and determine the amount

of nonabrasive residue.) New shot, grit, or a mix of shot and

grit shall be added periodically to the work mix to maintain the

specied prole range.

5. Disclaimer

5.1 This is a consensus standard developed by SSPC:

The Society for Protective Coatings. While every precaution

is taken to ensure that all information furnished in SSPC

standards is as accurate, complete and useful as possible,

SSPC cannot assume responsibility nor incur any obligation

resulting from the use of any materials or methods specied

therein, or of the standard itself.

5.2 This standard does not attempt to address problems

concerning safety and health associated with its use. The user

of this standard, as well as the user of all products or practices

described herein, is responsible for instituting appropriate

health and safety practices and for ensuring compliance with

all governmental regulations.

6. Notes

Notes are not requirements of this standard.

6.1 Spent abrasives may contain hazardous paint and

other foreign matter. Disposal, storage, and handling of spent

abrasives shall be performed in compliance with all applicable

Federal, state/provincial, and local regulations and project

requirements.

6.2 If non-compliant work mix is detected during continuous

recycling, blasting and handling equipment should be checked

for residual contamination after removal of the contaminated

media. Following cleaning, new compliant media should be fed

through the equipment and again tested for compliance with

requirements of SSPC-AB 2 before production work resumes.

6.3 The limitation for abrasive conductivity is based on

pressure immersion testing and accelerated outdoor exposure

tests performed by SSPC.2

2 SSPC report 91-07, Effect of Surface Contaminants on Coating Life, (June 1991).

6.4 Special precautions may be needed to avoid exceeding

permissible exposure limits (PELs) when removing hazardous

materials. Conform to all safety and regulatory requirements

based on the applicable federal, state and local requirements.

6.5 Examples of Specication Language: The

examples in Notes 6.5.1 and 6.5.2 may be used if the test

for non-abrasive residue or the preparation of a test area is

desired. Italicized language between square brackets provides

options for the specier.

6.5.1 The cleaned work mix shall meet the requirements

of SSPC-AB 2, including testing for non-abrasive residue in

accordance with the procedure described in the Appendix to

SSPC-AB 2 [prior to rst use/at other specied frequency].

6.5.2 The cleaned work mix shall meet the requirements

of SSPC-AB 2. Within 15 minutes after the start of surface

preparation [daily/other specied frequency] a test area

measuring at minimum 61 x 61 centimeters (2 x 2 feet) shall

be prepared and shall meet specied requirements for [surface

cleanliness/surface dust/surface prole range]. The test area

shall be accepted by the [facility owner’s representative] prior

to continuation of production.

Appendix: Procedure for Determining Amount of

Non-Abrasive Residue in Work Mix (nonmandatory

unless specied by procurement documents)

This procedure requires

• Two empty plastic or paper cups capable of holding

100-gram “grab” samples

• A scale accurate to 0.10 gram (0.0035 oz.) with a

“tare” function.

• A sheathed magnet (a magnet enclosed by a plastic

sheath, see Figure A1).

Step 1: Label one cup A and the other B. Tare the weight

of Cup A. If the scale does not have a “tare” function, weigh and

record the weight of Cup A, the weight of Cup A is subtracted

from the measured weight in Step 8 before determining if the

requirements of the standard have been met.

Step 2: Using Cup A, obtain a “grab” sample taken at

random from the cleaned work mix. The sample weight shall

be approximately 100 g (3.5 oz.). Weigh the sample on the

scale. Subtract the weight of the cup if the scale does not

have a “tare” function. Record the weight of the sample to the

nearest 0.1g.

Step 3: Spread the material over a clean surface of

approximately 0.1 square meter [m2] (1 square foot [ft2]).

Step 4: Place the sheathed magnet in contact with the

spread “grab” sample from Cup A. The magnet must remain

in contact with the bottom of the interior surface of the plastic

sheath. Note: Care must be taken not to pick up too much

SSPC-AB 2

March 2, 2015

Editorial Revision February 15, 2016

magnetic material at one time to avoid trapping non-magnetic

particles among the magnetic particles.

Figure A1

Separating Metallic Abrasive from the Work Mix

Using a Sheathed Magnet

Step 5: While keeping the magnet in contact with the

interior surface of the plastic sheath, move the sheathed

magnet over Cup B. Deposit the collected material into Cup

B by raising the magnet from the bottom of the plastic sheath.

Step 6: Return the sheathed magnet to the screened

portion of the abrasive and repeat Steps 4 through 6 until no

more magnetic material is retrieved from the spread “grab”

sample.

Step 7: Return the non-magnetic material from the “grab”

sample into Cup A. Weigh Cup A and compare the tared weight

of the non-magnetic material to the tared weight of the “grab”

sample recorded in Step 2. If the weight of the non-magnetic

material in Cup A is greater than 1 percent of the weight of the

initial sample, the work mix shall be recleaned.

SSPC standards, guides, and technical reports are copyrighted

world-wide by SSPC: The Society for Protective Coatings. Any

photocopying, re-selling, or redistribution of these standards,

guides, and technical reports by printed, electronic, or any

other means is strictly prohibited without the express written

consent of SSPC: The Society of Protective Coatings and a

formal licensing agreement.

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标签： #金属 #SPC

摘要：

SSPC-AB-2-2016 是一项由美国防护涂层协会（SSPC）发布的标准规范，专门针对回收铁质金属磨料在表面处理过程中的清洁度要求。该标准明确了再生磨料中杂质含量、颗粒级配、污染物限制及检测方法，旨在确保回收磨料保持足够的清洁度和性能，以在喷射清理作业中达到预期的表面处理质量。遵循 SSPC-AB-2-2016 有助于降低涂装失效风险、延长磨料使用寿命并减少废弃物排放，适用于钢结构防腐、桥梁涂装与船舶维修等工业领域。本文档为工程师、质量检验人员和施工承包商提供了可操作的技术准则，是实施可持续

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