MORIMATSU
O
A
I
L
G
D
PIPING INSPECTION
S/N
1
2
3
CHECK ITEM
Thickness
CHECK TOOLS
Surface
Harmful depth < allowed to be minimal
Thickness, and not greater than 1.6mm
Visual, ultrasonic thickness
gauge
Ovality
N/A
Vernier calipers
Dimension check
See Table 1
Vernier calipers, tape
measures
Dimension Check
Minimum wall thickness at any point less than
the prescribed nominal wall thickness. The
value is not greater than the wall thickness
12.5%
Vernier calipers, wall
thickness per thousand
Ruler, ultrasonic thickness
gauge
Appearance
Diameter
ASME
ASME B36.10
ASME B36.19
ASTM A123
1. Steel mill code; 2. Heat number; 3 sizes; 4
4
Identification
Physical Identification
5
Mill cert
Mill cert checking
Check the size, Heat/batch number, and
chemical composition, heat treatment status,
etc
Paper check
6
Zinc Coating
Thickness, surface
quality
See Table 4
Visual, membrane tester
materials; 5. Pound level
STANDARD
Visual
If no special requirement from client, inspection rate 20% refer to Heat No.
Appearance Inspection
Dimension Check
Physical Identification check
Thickness Check
Heat No. check
PMI Check
Dimension Requirement
Tolerance Requirement
Zinc Coating Requirement
FLANGE INSPECTION
S/N
1
2
CHECK ITEM
Appearance
Diameter
Surface(Especially
sealing face)
Dimension check
ASME
CHECK TOOLS
The final surface provided should be the
average roughness in Concentric or spiral
serrated surfaces in the range of 3.2~6.3
(125~250uin). The machining pattern should
be 1.8/mm to 2.2/mm (45/in to 55/in)
Roughness contrast block,
visual
Outer diameter, inner diameter, bolt hole
center moment, bolt hole diameter, thickness
degree, height, sealing surface diameter,
Sealing surface height
Vernier caliper, tape
measure, depth Scale
STANDARD
ASME B16.5
ASME B16.47
3
4
Identification
Mill cert
Physical Identification
Mill cert checking
1. Steel mill code; 2. Heat number; 3 sizes; 4
materials; 5. Pound level
Check the size, Heat/batch number, and
chemical composition, heat treatment status,
etc
Visual
Paper check
Appearance and sealing Face Check
Inner Diameter Check
Physical Identification Check
Bolt Hole Center Check
Outer Diameter Check
Bolt Hole Size Check
Thickness Check
Height Check
PMI Check
Ferrite Check(If Necessary)
Flange Type
Theoretical Dimension For Class 150 Flange
Dimension Tolerance should refer to
ASME B16.5 Chapter 7
Tolerance for Sealing Face Damage