SPA1 - NEW AND MAINTENANCE PAINTING FOR LONG TERM
SPA2 - NEW AND MAINTENANCE PAINTING FOR INDOOR USE ORSHORT TERM
PROTECTION
SPA3 - PAINTING OF METAL SURFACES FOR HOT DUTIES
TEMPERATURES FROM 100 0C TO 149 0C (TABLE SPA3a
TEMPERATURES FROM 150 0C TO 340 0C (TABLE SPA3b
TEMPERATURES ABOVE 340 0C (TABLE SPA3c)
SPA4 - PAINTING OF DAMP FERROUS SURFACES
SPA5 - MAINTENANCE PAINTING OF LOW PRESSURE GASHOLDERS
SPA6 - PAINTING OF NON-FERROUS SURFACES
TABLE SPA1a – New & maintenance painting for long term
Operatio Subject of Comments Relevant clauses in
n operation PA10
number
Section 2 Section 3
1 Mask areas 5.7
2 Blast clean BS 7079 Sa 2½ quality; 5.9.2 13.2
maximum profile 75 um
3 Clean all surfaces Immediately prior to primer 5.9.6
application
4 Apply primer High build epoxy aluminium 7 and 8 15.4
primer 75 um
5 Apply micaceous Dry film thickness 75 um 7 and 8 15.5
iron oxide minimum 15.6
TABLE SPA1b - surfaces with limited coating damage
Operatio Subject of Comments Relevant clauses in
n operation PA10
number
Section 2 Section 3
1 Mask areas 5.7
2 Mechanically wire BS 7079 St3 quality as 5.9.4 14.2
brush and feather minimum 14.3
edges
3 Clean all surfaces Immediately prior to primer 5.9.6
application
4 Apply primer High build epoxy aluminium 7 and 8 15.4
primer 75 um DFT
5 Apply micaceous micaceous iron oxide 75 um 7 and 8 15.5
iron oxide minimum DFT 15.6
TABLE SPA1c - Operations chart for final coatings
Operatio Subject of Comments Relevant clauses in
n operation PA10
number
Section 2 Section 3
1 Clean all surfaces 5.9.6 16.1
16.2
2 Apply undercoat High build epoxy undercoat 7 and 8 16.3
75um
3 Apply finish Epoxy or polyester acrylic 7 and 8 16.4
finish 40um
TABLE SPA1d - Operations chart for maintenance painting
Operatio Subject of Comments Relevant clauses in
n operation PA10
number
Section 2 Section 3
1 Mask areas 5.7
2 Surface Key existing paint system if 17.2.1
preparation of required
existing paint
system
3 Surface Blast cleaning or wire 5.9 17.2.2
preparation of brushing as specified
areas of exposed
substrate or where
paint is to be
removed
4 Clean all surfaces Immediately prior to 5.9.6
painting
5 Spot primer
Overlapping existing paint
6 Spot micaceous 7 17.3.1
at least 100 mm
iron oxide
7 Apply undercoat Overall or to areas spot
7 17.3.2
8 Apply finish painted above, as specified
TABLE SPA1e - Preferred systems
Stage Compliant solvent-based Minimum dry film
thickness (um)
1 High build epoxy aluminium primer 75
2 Epoxy Micaceous iron oxide 75
3 High build epoxy undercoat 75
4 Epoxy or polyester acrylic finish 40
Stage Water-borne acrylic Minimum dry film
thickness (um)
1 Primer 50
2 Micaceous iron oxide 75
3 Undercoat 50
4 Finish coat 50
TABLE SPA2a - Operation chart for new painting
Operatio Subject of Comments Relevant clauses in
n operation PA10
number
Section Section 3
2
1 Mask off 5.7 19.1
2 Remove all 19.2
3 deposits BS 7079,St3 as a minimum 5.9.4 19.3
4 Wire brush 5.9.6
5 Clean areas Minimum dry film thickness 7 20.2
6 Apply primer 45 um 7 20.3
Apply micaceous Minimum dry film thickness
iron oxide 50 um*
7** Apply undercoat Minimum dry film thickness 7 20.4
8** Apply finish 45 um* 7 20.4
Minimum dry film thickness
25 um*
* These values to be determined by means of a wet film thickness gauge as
specified in clause 8.
** Operations 7 and8 are to be carried out if a decorative finish is required.
TABLE SPA2b - Operation chart for maintenance painting
Operatio Subject of Comments Relevant clauses in
n operation PA10
number
Section 2 Section
3
1 Mask off 5.7 19.1
2 Remove all 19.2
3 deposits BS 7079,St3 as a minimum 5.9.4 19.3
4 Wire brush 5.9.6
5 Clean areas Minimum dry film thickness 45 7 20.2
6* Spot prime um 7 20.3
Spot micaceous Minimum dry film thickness 50
iron oxide um**
7 Apply undercoat Minimum dry film thickness 45 7 21.3
8 Apply finish um** 7 21.3
Minimum dry film thickness 25
um**
9 Apply full coat of Minimum dry film thickness 50 7 21.3
micaceous iron um**
oxide
* On completion of operation 6, if decorative finish is required, operations 7 and 8 only
are to be carried out.
Alternatively, operation 9 may be carried out on completion of operation 6, if a
decorative finish is not required.
** These values to be determined by means of a wet film thickness gauge as specified
in clause 8..
TABLE SPA3a - Operations chart for hot duty surfaces from 100 0 C to 149 0 C
Operatio Subject of Comments Relevant clauses in
n operation PA10
number
Section 2 Section 3
1 Mask 5.7 23.1.1
2 Remove surface 23.1.2
contamination
3 Blast clean BS7079 Sa 2½ quality; 5.9.2 23.1.3
maximum profile 75 um
4 Apply primer Dry film thickness depends 23.2.1
upon primer used
5 Apply additional Dry film thickness depends 23.2.2
coats of primer upon primer used
TABLE SPA3b - Operations chart for hot duty surfaces from 150 0 C to 340 0 C
Operati Subject of Comments Relevant clauses in
on operation PA10
number
Section 2 Section 3
1 Mask 5.7 24.1.1
2 Remove surface 24.1.2
contamination
3 Blast clean BS7079 Sa 3 quality; 5.9.2 24.1.3
maximum profile 75 um
4 Apply system System to be chosen from 24.2.2
the list of options below
Operati Subject of Comments Relevant clauses in
on operation PA10
number
Section 2 Section 3
a Thermally sprayed In accordance with BS 24.2.1
aluminium 2569: Part 2 and/or BS EN
22063
b Inorganic zinc Apply in accordance with 24.2.2
silicate manufacturers’ instructions
c Polysiloxane Apply in accordance with 24.2.2
inorganic coating manufacturers’ instructions
TABLE SPA3c - Operations chart for hot duty surfaces operating above 340 0 C
Operatio Subject of Comments Relevant clauses in
n operation PA10
number
Section 2 Section 3
1 Mask 5.7 24.1.1
2 Remove surface 24.1.2
contamination
3 Blast clean BS7079 Sa 3 quality; 5.9.2 24.1.3
maximum profile 75 um
4 Apply thermally In accordance with BS 25.2.1
sprayed 2569: Part 2 and/or BS EN
aluminium 22063
NOTE – Thermally sprayed aluminium is the preferred system and will provide the
longest service life.
Alternative coating systems to thermally sprayed aluminium are:
4a i) Inorganic zinc Apply in accordance with 25.2.2
silicate manufacturers’ instructions
ii) Apply sealer Apply in accordance with 25.2.4
manufacturers’ instructions.
Not required for
polysiloxane coatings
iii) Apply heat to cure In accordance with 25.2.4
sealer manufacturers’ instructions.
Check plant operating
conditions
4b Polysiloxane Apply in accordance with 25.2.2
inorganic coating manufacturers’ instructions
TABLE SPA4a - Operation chart for painting damp metal surfaces
Operatio Subject of Period before next Comments Relevant clauses
n operation operation in PA10
number
Minimu Maximu Section Section
m m 2 3
1 Remove all 5.9.6 27.1
surface
contamination,
etc.
2 Blast clean 4h BS 7079 Sa 5.9.2 27.2
2½ quality
3 Wash To remove 27.3
all grit and
dust
4 Remove Surface shall 27.4
droplets and not be wet
standing water
5 Apply system In accordance with To be 7 28.2
manufacturers’ applied by
instructions brushing
TABLE SPA5a - Operations chart for maintenance painting of low pressure
gasholders
Operatio Subject of Period before next Comments Relevant
n operation operation clauses in PA10
number
Minimu Maximu Sectio Sectio
m m n2 n3
1 Protect defined 5.7 30.5
areas against
effect of
preparation and
painting
operations
2 Remove all 5.9 31.1
surface 31.2
contamination
particularly
non-drying
paints and oil
films
3 Surface 4h Blast cleaning 5.9 31.3
preparation for or
painting mechanical/ha
nd cleaning,
as specified
4 Clean all Immediately 5.9.6 32
surfaces prior to primer
application
5 Apply primer 7 days Spot or full 7. 32.1
coat, as 8. 32.2
appropriate.
Stripe coat
welds and
edges
6 Apply 7 days Spot or full 7. 32.3
micaceous iron coat, as 8.
oxide (build appropriate
coat)
7 Apply 3 months Spot or 7. 32.4
micaceous iron optional full 8.
oxide coat, as
(if required) appropriate
8 Apply finish 2 weeks Overall or to 7. 32.5
(if required) areas spot 8.
painted
above, as
specified
TABLE SPA5b - Operations chart for maintenance painting of low pressure
gasholders cups, grips, and steel tank wind and water lines)
Operatio Subject of Period before next Comments Relevant
n operation operation clauses in PA10
number
Minimu Maximu Sectio Sectio
m m n2 n3
1 Position Preliminary 30.9
gasholder considerations 33.5
2 Protect defined Preliminary 5.7 30.5
areas considerations 33.9
3 Remove Preliminary 33.
sediment from considerations 33.5
cups
4 Lower water Preliminary 33.
levels considerations 33.4.1
5 Surface BS 7079 St3 5.9 31.3
preparation for as minimum
painting quality
6 Clean all Immediately 5.9.6 32
surfaces prior to paint
application
7 Apply epoxy 2h Full coat dry 32.7
paint (moisture film thickness
tolerant grade) 100 um
minimum
8 Restore water Before leaving 33
levels site
TABLE SPA6a - Non-ferrous surfaces - surface preparation
Non-ferrous surfaces Surface preparation Comments
Preferred First option
option
a) New galvanizing Sweep Hand abrading The preferred and first
abrasive blast options eliminate the need
for an ‘Etch’ primer. An
‘Etch’ primer (T-wash)
shall be used where these
options are impractical
b) Weathered Stiff bristle - Weathered surface
galvanizing brushing provides its own key
c) Previously painted Sweep Hand abrading -
galvanizing abrasive blast
d) Aluminium Sweep Hand abrading Thin gauge aluminium
abrasive blast should not be blast
cleaned and should be
treated with an etch
primer prior to the
application of
intermediate and finish
coats.
Chlorinated hydrocarbon
solvent shall not be used
e) Stainless steel Sweep - Only aluminium oxide
abrasive blast should be used as the
blasting medium
f) Pre-painted Sweep Hand abrading -
cladding (‘Plastisol’ abrasive blast
cladding or
equivalent)
g) Glass reinforced Sweep Hand abrading -
plastics abrasive blast
h) Fusion bonded Sweep Hand -
epoxy abrasive blast abrading
i) Multi component Sweep Hand abrading -
liquids abrasive blast
j) Concrete In accordance - Surface abrasion may not
with the be required for new
Manufacturers concrete. Old paint
’ should be removed if
recommendati required using scrabblers
ons
TABLE SPA6b - Non-ferrous surfaces - Paint systems
Non-ferrous surfaces Groups of paint systems Comments
G1 G2 G3
a) New galvanizing Water- Epoxy Alkyd or -
borne high build modified
acrylic alkyd
b) Weathered Water- Epoxy Alkyd or Any damaged
galvanizing borne high build modified galvanizing shall be
acrylic alkyd repaired with zinc
rich epoxy
c) Previously painted Water- Epoxy Alkyd or -
galvanizing borne high build modified
acrylic alkyd
d) Aluminium Water- Epoxy Alkyd or -
borne high build modified
acrylic alkyd
e) Stainless steel Water- Epoxy - -
borne high build
acrylic
f) Pre-painted Water- Moisture Alkyd or Any damaged areas
cladding (‘Plastisol’ borne cured modified where the steel
cladding or acrylic urethane alkyd substrate is
equivalent) exposed, should be
repaired in
accordance with
SPA1
g) Glass reinforced Water- Moisture Alkyd or -
plastics borne cured modified
acrylic urethane alkyd
h) Fusion bonded Water- Moisture Alkyd or -
epoxy borne cured modified
acrylic urethane alkyd
i) Multi component Water- Moisture Alkyd or -
liquids borne cured modified
acrylic urethane alkyd
j) Concrete Water- Moisture Alkyd or For new concrete a
borne cured modified sealer coat may be
acrylic urethane alkyd required
NOTE Other compliant systems which meet the requirements of PA9 may be proposed
as a variant for consideration by Transco.
TABLE SPA6c - Non-ferrous surfaces - Paint systems - Initial coat
Non-ferrous surfaces Options
G1 G2 G3
a) New galvanizing Water-borne Pigmented high Alkyd or modified
acrylic micaceous build epoxy (65 alkyd (40 um
iron oxide (65 um um minimum) minimum)
minimum)
b) Weathered Water-borne Pigmented high Alkyd or modified
galvanizing acrylic micaceous build epoxy (65 alkyd (40 um
iron oxide (65 um um minimum) minimum)
minimum)
c) Previously painted Water-borne Pigmented high Alkyd or modified
galvanizing acrylic micaceous build epoxy (65 alkyd (40 um
iron oxide (65 um um minimum) minimum)
minimum)
d) Aluminium Water-borne Pigmented high Alkyd or modified
acrylic micaceous build epoxy (65 alkyd (40 um
iron oxide (65 um um minimum) minimum)
minimum)
e) Stainless steel Water-borne Chloride free -
acrylic micaceous epoxy high build
iron oxide (45 um (65 um minimum)
minimum)
f) Pre-painted Water-borne Compatible Compatible alkyd
cladding (plastisol acrylic micaceous moisture cured or modified alkyd
cladding) iron oxide (45 um urethane (25 um (40 um minimum)
minimum) minimum)
g) Glass reinforced Water-borne Compatible Compatible alkyd
plastics acrylic micaceous moisture cured or modified alkyd
iron oxide (45 um urethane (25 um (40 um minimum)
minimum) minimum)
h) Fusion bonded Water-borne Compatible Compatible alkyd
epoxy acrylic micaceous moisture cured or modified alkyd
iron oxide (45 um urethane (25 um (40 um minimum)
minimum) minimum)
i) Multi component Water-borne Compatible Compatible alkyd
liquids acrylic micaceous moisture cured or modified alkyd
iron oxide (45 um urethane (25 um (40 um minimum)
minimum) minimum)
j) Walls {Single pack Moisture cured Compatible alkyd
} urethane sealer or modified alkyd
{water-borne (40 um minimum)
Concrete acrylic} {primer
(30 um }
{minimum)
}
