SSPC-AB-4-2016 可回收压缩泡沫磨料

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SSPC-AB 4

November 24, 2015

Editorial Revision August 12, 2016

SSPC: The Society for Protective Coatings

Abrasive Standard No. 4

RECYCLABLE ENCAPSULATED ABRASIVE MEDIA

(in a compressible cellular matrix)

1. SCOPE

1.1 This standard provides requirements for selecting and

evaluating abrasive media encapsulated in a compressible

non-uniform cellular matrix used to blast clean steel and other

surfaces prior to the application of protective coatings. The

standard also includes requirements for quality control of new

and recycled media.

2. DESCRIPTION

2.1 ENCAPSULATED ABRASIVE MEDIA: Encapsulated

abrasive media consist of natural or manufactured abrasive

grains surrounded by a dry, compressible, open-cell material.

These abrasives are used to reduce dust generation and

ricochet damage to adjacent surfaces when blast cleaning,

and to “feather” the edges of intact coating during spot repair

procedures of coatings on steel and other substrates. During

the recycling process, the media is cleaned to remove abrasive

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

contaminants.

2.2 RECYCLED ABRASIVE WORKING MIX: The

working mix develops during blast cleaning and recycling,

and is composed of new and recycled encapsulated abrasive

media.

2.3 DEFINITIONS

Qualication tests are tests that are run to qualify that a

material meets the requirements of the standard.

Conformance tests are tests that are per formed to verify

that the material being submitted has the same properties as

the material that initially qualied.

Quality control tests are eld tests that are performed to

verify that the material complies with specied requirements

immediately prior to use.

3. REFERENCED STANDARDS

3.1 The latest issue, revision, or amendment of the

referenced documents in effect on the date of invitation to bid

shall govern, unless otherwise specied. Those documents

marked with an asterisk (*) are referenced only in the Notes,

which are not requirements of this standard.

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

any of the cited referenced standards and this standard, the

requirements of this standard shall prevail.

3.3 SSPC Standards:

AB 1 Mineral and Slag Abrasives

AB 3 Ferrous Metallic Abrasives

3.4 American Society for Testing and Materials (ASTM)

Standards:1

D4940 Standard Test Method for Conductimetric

Analysis of Water Soluble Ionic

Contamination of Blasting Abrasives

* D4417 Standard Test Method for Field

Measurement of Surface Prole of

Blast Cleaned Steel

D7393 Practice for Indicating Oil in Abrasives

4. Requirements for New Media

(Qualication Tests)

The abrasive manufacturer shall certify that new media

meeting this standard complies with the requirements of

Sections 4.1 through 4.5.

4.1 GRIT REQUIREMENTS: Mineral and slag abrasives

shall meet the requirements of SSPC-AB 1. Ferrous metallic

abrasives shall meet the requirements of SSPC-AB 3. When

aluminum oxide is used, the aluminum oxide grain shall be

of sufcient hardness to scratch glass when tested by placing

some of the abrasive material between two glass microscope

slides and, while applying pressure, moving one slide over

the other in a reciprocating motion. The glass slide shall be

examined for scratches. The abrasive manufacturer shall certify

that the aluminum oxide grit meets the following requirements:

Minimum aluminum oxide content 95%

Minimum specic gravity 3.60

4.2 DUST CONTROL: Dust shall be controlled and the dry

encapsulating matrix shall demonstrate reduced dust emission

characteristics. The manufacturer shall provide certication

that emission levels as documented in EPA’s Compilation of

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

referenced ASTM standards, visit the ASTM website, <http://www.astm.org>, or contact

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

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

SSPC-AB 4

Novcmber 24, 2015

Editorial Revision August 12, 2016

Air Pollutant Emission Factors (AP-42 Section 13.1)2 or as

determined in similar independent test protocols demonstrate

that the foam component in the composite has the ability to

maintain emission levels through 10 blast cycles below 0.02

kg/kg of total particulates and below 0.004 kg/kg of PM-10, or

as otherwise specied.

4.3 SURFACE PROFILE: Abrasives meeting the

requirements of this standard shall be capable of providing the

surface proles required by the user.

4.4 WATER-SOLUBLE CONTAMINANTS: The

conductivity of the encapsulated abrasive shall not exceed

1000 micromhos/cm (1000 microSiemens/cm) when tested in

accordance with ASTM D4940.

4.5 OIL CONTENT: When tested in accordance with

ASTM D7393, no oil shall be visible on the surface of the water

or as an emulsion.

4.6 HEALTH AND SAFETY REQUIREMENTS: The

abrasive material as supplied shall comply with all applicable

federal, state, and local regulations (see Note 9.3).

4.6.1 The manufacturer shall provide the purchaser with

sufciently detailed chemical analyses to provide the protective

engineering and administrative controls for blast cleaning

identied in federal, state, and local codes.

4.6.2 Safety data sheets (SDS) shall be furnished for all

abrasive materials supplied.

5. CONFORMANCE TESTS

Upon receipt the purchaser shall verify performance of the

material in accordance with Sections 4.1, 4.4, and 4.5.

6. QUALITY CONTROL TESTS

The following tests shall be conducted by the end-user

of the abrasive (e.g., contractor) during conduct of the job to

ensure quality.

6.1 REQUIRED PROFILE: In-process testing for

compliance with prole requirements shall be performed as

specied on the surface being prepared (see Note 9.1).

6.2 REQUIREMENTS FOR RECYCLED ABRASIVE

WORKING MIX

6.2.1 Particle Size Distribution

6.2.1.1 The contractor shall process the media through

a at deck, vibratory screen classier that separates both

oversized and undersized particles; or other unit shown to

meet the dust control requirements of Section 4.2. New media

2 This document may be accessed online through the US Environmental Protection Agency

website <https://www3.epa.gov/ttn/chief/ap42/ch13/nal/c13s01.pdf>

shall be added to the working mix as necessary to deliver the

specied surface prole. After recycling, all particles shall pass

an ANSI #3 screen and not more than 10% shall pass an ANSI

#20 screen. Within this range, screen sizes are frequently

adjusted to meet project requirements.

6.2.1.2 Test for Classier Efciency: The test is

performed as follows:

Step A. A quantity of recycled media is passed once

through the classier. The rejected material that

passes through the bottom sieve is collected, the

weight or volume is measured, and the material is

labeled and set aside.

Step B. The remaining media from Step A is passed

through the classier a second time. The rejected

material that passes through the bottom sieve is

again collected, and the weight or volume of material

is measured. The material is labeled and set aside.

Step C. The remaining media from Step B is passed

through the classier. The material that passes

through the bottom sieve is collected, and the weight

or volume of material is measured.

Step D. The rejected material collected from Steps B

and C is combined.

If the weight or volume of rejected material from Step D

is equal to or greater than the weight or volume of rejected

material measured in Step A, adjustments to the classier and

or ow rate shall be made to increase the classier efciency

(see Note 9.2).

6.2.1.3 Testing Schedule: The test described in Section

6.2.1.2 shall be conducted two hours after the startup of

cleaning operations, and repeated every two hours. After

three tests have been completed at two-hour intervals, the

test interval is typically expanded to once every ten hours of

operation, or as specied.

6.2.2 Water-Soluble Contaminants: The abrasive

material shall be tested for water-soluble contaminants in

accordance with ASTM D4940. A representative sample

shall be obtained by collecting a minimum of three samples

(approximately 450 grams [1 lb] each) of the recycled abrasive

material. The three samples shall be collected at three different

times during an 8-hr period before new media is added to the

recycled material. The conductivity of each abrasive sample

shall not exceed 1000 µS/cm when tested in accordance with

ASTM D4940.

6.2.3 Oil Content: The abrasive material shall be tested

for oil content in accordance with ASTM D7393. Representative

samples of the recycled material obtained according to the

procedure in Section 6.2.2 shall have no oil visible on the

surface of the water or as an emulsion.

SSPC-AB 4

November 24, 2015

Editorial Revision August 12, 2016

7. Documentation

7.1 DOCUMENTATION OF INSPECTION AND TESTING:

The supplier shall furnish documentation certifying that the

new media meets requirements of Sections 4.1 through 4.5

and any other documentation required by the procurement

documents (see Note 9.3).

7.1.1 List of Tests Performed: Documentation shall

include the title of the test, the appropriate standards used, any

deviation from standard practice, and the numerical results of

the testing.

7.1.2 Testing Facilities: The documentation of facilities

shall include the name and location of the laboratory, the

responsible laboratory ofcial, laboratory certication or other

evidence of qualication. Evidence of qualication shall include

documentation that the laboratory is engaged, as a regular

part of its business, in performing the inspections and tests

required in Section 4.1 and subparts.

7.1.3 Date of Testing: This shall include the date of

original qualication (if applicable) and dates of completion

and ofcial approval of testing results.

8. Disclaimer

8.1 While every precaution is taken to ensure that all

information furnished in SSPC standards and specications is

as accurate, complete, and useful as possible, SSPC cannot

assume responsibility nor incur any obligation resulting from

the use of any materials, coatings, or methods specied herein,

or of the specication or standard itself.

8.2 This standard does not attempt to address problems

concerning safety 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.

9. Notes

Notes are not requirements of this standard.

9.1 A typical prole range for encapsulated media is 0 to

4 mils (0 to 100 micrometers) on mild steel when measured

in accordance with ASTM D4417. Materials furnished under

this standard that produce the required surface prole under

standard test conditions may produce a different surface

prole depending upon job condition, type of surface, blasting

pressure, etc.

9.2 Other Requirements: In addition to the requirements

listed above, the specier may also require performance tests

to establish abrasive consumption rate, cleaning rate, and

abrasive breakdown.

9.3 Note that the spent abrasive may contain hazardous

paint and other foreign matter. Federal, state, and local

regulations govern proper disposal of spent abrasives.

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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摘要：

SSPC-AB-4-2016 是一项由美国防护涂料协会（SSPC）制定的标准规范，专门针对可回收压缩泡沫磨料在表面处理中的应用。该标准定义了此类磨料的性能要求、测试方法和质量控制准则，确保其在工业涂装和防腐工程中具备高效清洁、低粉尘排放和可循环使用的特点。可回收压缩泡沫磨料通常由聚合物或复合材料制成，重量轻且不易碎裂，适用于船舶、桥梁、储罐等钢结构表面的除锈、除漆及表面粗糙度调整。遵循SSPC-AB-4-2016标准，用户可以优化施工成本，并显著减少废弃物的产生，符合现代环保要求。该标准还提供了

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