Pre-Installation Checklist<\/h2>\n\n- Flange rating matches design pressure and temperature<\/li>\n
- Material compatibility with process fluid<\/li>\n
- Gasket type and size are correct<\/li>\n
- Bolts and nuts are proper grade and length<\/li>\n
- Flange faces are clean and undamaged<\/li>\n<\/ul>\n
Step 1: Flange Alignment<\/h2>\n
Proper alignment is critical. The flanges should be parallel within 1\/16 inch per foot of diameter. Use alignment pins to match bolt holes without forcing.<\/p>\n
Step 2: Gasket Installation<\/h2>\n
Select the right gasket: Spiral Wound for general purpose, RTJ for high-pressure oil & gas, Non-Asbestos Sheet for low-medium pressure, PTFE Enveloped for corrosive service.<\/p>\n
Step 3: Bolt Torquing Sequence<\/h2>\n\n- Insert all bolts hand-tight<\/li>\n
- First pass: 30% of final torque in star pattern<\/li>\n
- Second pass: 60% of final torque in star pattern<\/li>\n
- Final pass: 100% of final torque in star pattern<\/li>\n<\/ol>\n
Common Installation Mistakes to Avoid<\/h2>\n\n- Over-torquing (stretches bolts)<\/li>\n
- Using wrong gasket type<\/li>\n
- Skipping the star pattern sequence<\/li>\n
- T\u00e1i s\u1eed d\u1ee5ng c\u00e1c mi\u1ebfng \u0111\u1ec7m c\u0169<\/li>\n<\/ul>\n
Step 1: Flange Alignment<\/h2>\n
Proper alignment is critical. The flanges should be parallel within 1\/16 inch per foot of diameter. Use alignment pins to match bolt holes without forcing.<\/p>\n
Step 2: Gasket Installation<\/h2>\n
Select the right gasket: Spiral Wound for general purpose, RTJ for high-pressure oil & gas, Non-Asbestos Sheet for low-medium pressure, PTFE Enveloped for corrosive service.<\/p>\n
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