Piping and pressure system notes

By Fred Vierheller, senior mechanical engineer, Certified SOLIDWORKS Professional · Updated November 4, 2026

7 copy-ready notes for piping and pressure systems, in English and Spanish. Copy a note, replace the [bracketed] example values, and check the "Watch for" line before you release the drawing.

Values in [brackets] are examples; replace them with your own. Notes marked Verify values rely on common practice; confirm them with your supplier or design engineer. These notes are examples, not an engineering approval of your drawing.

PIP-01 Design and fabrication code PIP-02 Pressure test PIP-03 Cleanliness PIP-04 Preservation after cleaning PIP-05 Bonding and grounding PIP-06 Pipe identification PIP-07 Corrosion protection

PIP-01

Design and fabrication code

Checked

DESIGN, FABRICATE, EXAMINE AND TEST PER ASME B31.3.

DISEÑAR, FABRICAR, EXAMINAR Y PROBAR SEGÚN ASME B31.3.

Basis: ASME B31.3 (process piping). checked

PIP-02

Pressure test

Verify values

HYDROSTATIC TEST AT [1.5] X DESIGN PRESSURE, [10] MIN HOLD, NO LEAKS. Pneumatic (when hydro is impractical): [1.1] X DESIGN PRESSURE.

PRUEBA HIDROSTÁTICA A [1.5] VECES LA PRESIÓN DE DISEÑO, [10] MIN, SIN FUGAS.

Basis: ASME B31.3 leak test factors (1.5 hydrostatic, 1.1 pneumatic). checked; hold time: verify

PIP-03

Cleanliness

Verify values

CLEAN WETTED SURFACES TO IEST-STD-CC1246, LEVEL [500], NVR [D]. VERIFY AND RECORD.

LIMPIAR LAS SUPERFICIES EN CONTACTO CON EL FLUIDO SEGÚN IEST-STD-CC1246, NIVEL [500], NVR [D]. VERIFICAR Y REGISTRAR.

Use: oxygen, propellant and high-purity systems.

Basis: IEST-STD-CC1246; current revision's NVR notation: verify

PIP-04

Preservation after cleaning

Verify values

AFTER CLEANING AND TEST, CAP ALL OPENINGS AND PRESSURIZE WITH [10] PSIG DRY NITROGEN. TAG "UNDER PRESSURE".

DESPUÉS DE LIMPIAR Y PROBAR, TAPAR TODAS LAS ABERTURAS Y PRESURIZAR CON [10] PSIG DE NITRÓGENO SECO. ETIQUETAR "BAJO PRESIÓN".

Basis: Fred's NASA-project notes; nitrogen grade per the project spec. verify

PIP-05

Bonding and grounding

Verify values

BOND AND GROUND PIPING PER NFPA 77. BOND FLAMMABLE-SERVICE PIPING AT ENDS AND AT [100] FT MAX INTERVALS.

UNIR Y CONECTAR A TIERRA LA TUBERÍA SEGÚN NFPA 77. EN SERVICIO INFLAMABLE, EN LOS EXTREMOS Y A INTERVALOS DE [100] PIES MÁX.

Basis: NFPA 77 (static electricity). checked; interval from the project spec: verify

PIP-06

Pipe identification

Checked

IDENTIFY PIPING PER ASME A13.1: CONTENTS AND FLOW DIRECTION.

IDENTIFICAR LA TUBERÍA SEGÚN ASME A13.1: CONTENIDO Y DIRECCIÓN DE FLUJO.

Basis: ASME A13.1. checked

PIP-07

Corrosion protection

Checked

CARBON STEEL EXPOSED TO ATMOSPHERE: HOT-DIP GALVANIZE PER ASTM A123.

ACERO AL CARBONO EXPUESTO A LA INTEMPERIE: GALVANIZAR POR INMERSIÓN EN CALIENTE SEGÚN ASTM A123.

Basis: ASTM A123. checked

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