Resources
Dimensional Tolerances Chart
Reference tables for common industrial product tolerance discussions before final specification review.
Use Weight Calculator
ASTM / ASME / EN
MTC Support
Heat No. Traceability
TPI Coordination
Tolerance Reference Tables
Use these tables as placeholder reference containers. Final tolerances must be confirmed against the purchase specification, drawing, product standard and MTC.
| Product | Typical Parameters to Confirm | Reference Standard / Input |
|---|---|---|
| Pipes & Tubes | OD, wall thickness, length, ovality, straightness | ASTM / ASME / EN / API as applicable |
| Butt Weld Fittings | Center-to-end, OD, wall, angularity, shape | ASME B16.9 / MSS SP-75 |
| Forged Fittings | Bore, socket depth, thread, pressure class | ASME B16.11 |
| Flanges | OD, PCD, bore, facing, thickness, drilling | ASME B16.5 / B16.47 |
| Fabricated Items | Drawing dimensions, weld size, finish, coating | Approved drawing / project specification |
Dimensional Data Capture
| RFQ Field | Why It Matters |
|---|---|
| Nominal Size / OD | Defines product family and matching fittings or flanges |
| Wall / Thickness | Affects pressure, weight, welding and stock selection |
| Length / Quantity | Controls packing, transport and dispatch planning |
| Tolerance Requirement | Prevents mismatch between standard supply and project drawing |
| Inspection Requirement | Determines dimensional report, TPI and acceptance process |
