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OCR for page 47
B-1
APPENDIX B
LIST AND DESCRIPTION OF EXISTING TSMC GUIDES
Surface Preparation
STANDARD BLAST PROFILE BLAST FINISH BLAST ABRASIVE
SSPC SP-5/NACE No.1 2.5-mil angular IAW ASTM
(marine and immersion); 4417 (Method B - profile Clean, dry and sharp angular
ANSI/AWS C2.23-XX
SSPC SP-10/NACE No. depth gauge or Method C - abrasive
2 (other) replica tape or both)
Draft #2 2.0- to 4.0-mil anchor tooth Clean, sharp, angular abrasive
ANSI/AWS C2.18-XX profile for TSMC thickness of of suitable mesh size; steel
SSPC SP-10
SSPC CS 23.00A-XX 12 mils or less; measured grit, mineral slag or
NACE TPC #XA with replica tape aluminum oxide
Surface is to have a
According to specifications Hematitic chilled iron grit,
white metallic
EN 22063 agreed upon by relevant aluminum oxide grit or other
appearance and uniform
parties (grit size of 0.5 to 1.5 mm)
texture
Surface is to have a Hematitic chilled cast iron
white metallic Surface shall be verified grit, aluminum oxide grit or
ISO 2063
appearance and uniform with a reference surface other (grit size of 0.5 to 1.5
texture mm)
JIS H 8300
None specified None specified None specified
JIS H 8301
2.0- to 3.0-mil profile IAWAluminum oxide (16 to 30
MIL-STD-2138A(SH) SSPC SP-5 ASTM 4417 (Method B or mesh) or angular chilled iron
C) (25 to 40 mesh)
Hard, dense, angular blast
2.0- to 3.0-mil profile,
U.S. Army COE Manual media such as aluminum
SSPC SP-5 depending on TSMC material
EM 1110-2-3401 oxide, iron oxide and angular
and thickness
steel grit
OCR for page 47
B-2
TSMC Application
ENVIRONMENTAL
STANDARD HOLDING PERIOD COATING THICKNESS SPRAY PARAMETERS
CONDITIONS
Typically within 6
hours of blasting, To be validated at each
5°F above dew
ANSI/AWS C2.23-XX depending on Ref. AWS C2.18 below crew change with a bend
point
environmental test
conditions
For 10- to 20-year life in salt
Typically within 6
Draft #2 water immersion:
hours of blasting,
ANSI/AWS C2.18-XX 9°F above dew Zinc 14 to 16 mils Several perpendicular
depending on
SSPC CS 23.00A-XX point Aluminum 10 to 12 mils overlapping passes
environmental
NACE TPC #XA Zinc/Aluminum 14 to 16
conditions
mils
Typically within 4
Varies
hours of blasting,
5°F above dew Zinc 2 to 10 mils
EN 22063 depending on None specified
point Aluminum 4 to 12 mils
environmental
Zinc/Aluminum 2 to 8 mils
conditions
Varies
Shall not exceed 2 to
Zinc 6 to 14 mils
12 hours, depending on 5°F above dew
ISO 2063 Aluminum 4 to 10 mils 2-ft square block pattern
environmental point
Zinc/Aluminum at least 6
conditions
mils
Varies
JIS H 8300
None specified None specified Zinc up to 12 mils None specified
JIS H 8301
Aluminum up to 16 mils
Spraying must be
Angle of spray stream
started and completed 10°F dew point
MIL-STD-2138A(SH) 10 to 15 mils shall be close to 90° and
within 4 and 6 hours, spread
respectively never less than 45°
Aluminum 10 mils for
U.S. Army COE Manual Within 4 hours of At least 5°F above seawater Block pattern measuring
EM 1110-2-3401 blasting the dew point Zinc/Aluminum 6 to 16 24 in. on a side
mils for fresh water
OCR for page 47
B-3
TSMC QA Procedures
STANDARD FINISH POROSITY BEND TEST BOND TEST
ASTM D4541 1 test per
Measurements may 500 ft2
Uniform without blisters, cracks,
be used to qualify Mentioned, but not Zinc - >500 psi
ANSI/AWS C2.23-XX loose particles, or exposed steel when
process and defined Aluminum - >1,000 psi
viewed at 10X
parameters 85/15 Zn/Al - >700 psi
Al/Al2O3 - >1,000 psi
Bend coupons and a
Draft #2 Used for qualifying mandrel with a
ANSI/AWS C2.18-XX spraying parameters; suitable diameter
No degraded TSC ASTM C 633
SSPC CS 23.00A-XX not normally used for (0.5 in. for TSC
NACE TPC #XA process control thickness of 7 to 12
mils)
Uniform without blisters or bare
EN 22063 patches and free from non-adhering Not specified None specified Grid test and tensile test
metal and defects
Uniform without blisters, bare
Grid test, adhesive tape
ISO 2063 patches, non-adhering metal and Not specified None specified
and/or tensile test
defects
Zinc not specified Zinc IAW JIS H 8661
JIS H 8300 Free from blisters, cracks and other
Aluminum IAW None specified Aluminum IAW JIS H
JIS H 8301 harmful defects
JIS H 8663 8663
Uniform appearance with surface
defects limited to small nodules not
No disbonding,
greater than 0.025 in. in height. The
delamination, or Minimum bond strength of
coating shall not contain blisters,
MIL-STD-2138A(SH) Not specified gross cracking shall 1,500 psi and an average
cracks, chips, loosely adhering
occur due to bond strength of 2,000 psi
particles, oil, internal contaminants or
bending
pits exposing the undercoat or
substrate
Smooth with no blisters, cracks, No cracks or minor
U.S. Army COE Manual chips, loosely adhering particles, oil, cracking with no
Not specified Not specified
EM 1110-2-3401 pits exposing the substrate and lifting of the
nodules coating
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B-4
Sealers and Topcoats
STANDARD WHEN TO SEAL RECOMMENDED MATERIALS
Acidic or alkaline environments, direct
chemical attack, decorative finish is
ANSI/AWS C2.23-XX None specified
required, abrasion resistance is required,
splash or immersion service is intended
Draft #2
ANSI/AWS C2.18-XX Wash primers (0.3 to 0.5 mils) or sealers
Recommended
SSPC CS 23.00A-XX (1.5 mils)
NACE TPC #XA
Natural sealing (by oxidation), chemical
conversion (phosphating, reactive
EN 22063 Not specified
painting, etc.) or application of a paint
system
PVB primers or paints with a single vinyl
Aggressive environments, such as
ISO 2063 component; paints based on chlorinated
industrial or marine
rubber or epoxy systems
JIS H 8300
Not specified None specified
JIS H 8301
High temperature: heat resistant
aluminum paint IAW TT-P-28 or
MIL-STD-2138A(SH) Not specified equivalent seal coat
Low temperature: MIL-P-24441
Polyester powder
U.S. Army COE Manual
Recommended to fill porosity Coal tar epoxy, vinyl
EM 1110-2-3401
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B-5
Maintenance and Repair
TSC/SEALER
STANDARD SURFACE PREP TOUCH-UP
APPLICATION
Inspect and maintain on
a periodic basis, before
ANSI/AWS C2.23-XX Not specified Not specified
maintenance repair and
recoating is required
Solvent clean; scrape off
loosely adherent paint;
Draft #2 Spray can degreasing
hand brush, abrasive
ANSI/AWS C2.18-XX and spray can painting
brush blast, power tool As specified
SSPC CS 23.00A-XX may be used for
and abrasive blast;
NACE TPC #XA temporary repairs
feather and lightly
abrade
EN 22063 Not specified Not specified Not specified
ISO 2063 Not specified Not specified Not specified
JIS H 8300
Not specified Not specified Not specified
JIS H 8301
Solvent clean; scrape,
Paint coating may be
brush, blast, abrade
MIL-STD-2138A(SH) As specified replaced when TSC
depending on level of
facilities are unavailable
damage
U.S. Army COE Manual Same as original Repair with TSC, sealer,
SSPC SP-10
EM 1110-2-3401 application and paint as required