What is perforated test sieve calibration?

Perforated test sieve calibration is the process of measuring and verifying the aperture size, pitch and compliance of perforated plate sieves against IS 460 Part 2 and ISO 3310-2 tolerance limits. It ensures that sieves used in grain size analysis, aggregate testing and soil testing produce accurate and reliable results.

Which IS code governs perforated test sieve calibration in India?

IS 460 Part 2 governs perforated plate test sieves in India. IS 460 Part 1 covers wire cloth sieves and IS 460 Part 3 covers electroformed sieves. ISO 3310-2 is the equivalent international standard for perforated plate sieves.

Why is NABL sieve calibration required for a testing laboratory?

NABL ISO/IEC 17025:2017 requires all measuring equipment including test sieves to be calibrated at defined intervals with traceable calibration certificates. A valid NABL sieve calibration certificate is mandatory during NABL assessments and surveillance audits. Using uncalibrated sieves invalidates test results and can lead to NABL non-conformities.

How often should perforated test sieves be calibrated?

Perforated test sieves should be calibrated at least once per year under normal laboratory use conditions. High-frequency use, accidental damage or NABL audit requirements may necessitate more frequent calibration. Global Lab recommends annual calibration and provides calibration due date reminders.

What aperture sizes does Global Lab calibrate for perforated test sieves?

Global Lab calibrates perforated test sieves across the full range used in construction material testing — from 4.75mm to 125mm nominal aperture sizes per IS 460 Part 2, covering sieves used for aggregate grading, soil classification, bitumen aggregate testing and concrete mix design.

What is the difference between wire mesh sieve and perforated plate sieve?

Wire mesh sieves (IS 460 Part 1) use woven wire cloth and are used for finer particle sizes (typically below 4.75mm). Perforated plate sieves (IS 460 Part 2) use punched metal plates with square or round holes and are used for coarser particle sizes (4.75mm and above). Both require separate NABL calibration procedures.

Does Global Lab provide on-site sieve calibration?

Global Lab primarily calibrates sieves at its NABL-accredited laboratory facilities. Sieves can be couriered to the nearest Global Lab location — Mumbai, Vasai, Kolkata, Guwahati, Bhubaneswar, Surat or Ahmedabad. Contact our team to discuss on-site calibration requirements for large sieve sets.

How long does sieve calibration take at Global Lab?

NABL-accredited calibration certificates for perforated test sieves are issued within 3 working days of instrument receipt. Expedited 24-hour processing is available for urgent requirements.

#1 Perforated Test Sieve Calibration | NABL

Perforated Test Sieve Calibration
(IS 460 Part 1 — Perforated Plate Sieves)

NABL-accredited calibration of perforated plate test sieves per IS 460 Part 1 — verifying aperture dimensions for aggregate sieve analysis from 4.75mm to 80mm for MORTH compliance.

Overview

What is the Perforated Test Sieve Calibration?

Perforated Plate Test Sieves (IS 460 Part 1) have circular or square holes for coarse aggregate sieve analysis in the 4.75–80mm range. IS 460 Part 1 specifies aperture tolerance. Out-of-tolerance sieves give incorrect grading curves — critical for MORTH aggregate compliance.

At Global Lab, perforated sieve calibration per IS 460 Part 1 measures minimum 10 apertures per sieve using calibrated pin gauges or digital micrometer — reporting mean aperture, SD, maximum, minimum and pass/fail against IS 460 Part 1 tolerance.

Non-Destructive

Minimal surface preparation. Structure integrity is preserved throughout testing.

Fast Turnaround

On-site results within hours. Digital reports dispatched within 24 hours.

NABL Certified

All test and calibration results are backed by traceable measurements and standardized procedures.

Pan-India Coverage

Site engineers deployed across 7 lab locations and all major project sites.

Digital Reporting

Access reports anytime via Autovity QLMS client dashboard — zero paperwork.

High Accuracy

Results correlated to cube compressive strength with ±2% precision range.

Test in Action

Perforated Test Sieve Calibration — Site Images

10 Perforated Sieve Apertures Measured Statistically

Pin Gauge Reference for Hole Diameter

IS 460 Part 1 Mean Aperture vs Tolerance Pass/Fail

Test Procedure

How the Perforated Test Sieve Calibration is Conducted

1

Surface Preparation

A shallow groove (approx. 25mm deep) is cut into the concrete surface using a diamond-tipped cutting tool. The surface is cleaned of dust and debris.
2

Insert Disc Placement

A specially designed steel insert disc is placed into the groove. A thin rod connects the disc to the pullout apparatus above the surface.
3

Hydraulic Pullout Force Application

A hydraulic jack applies a steady, controlled pullout force to the insert disc via the reaction ring resting on the concrete surface.
4

Failure Load Recording

The maximum force at which the concrete cone is extracted is recorded. A digital load indicator provides real-time readings with data logging.
5

Strength Calculation & Reporting

The pullout force is correlated to cube compressive strength using established calibration curves. NABL-accredited reports are issued via Autovity QLMS.

Standards & Specifications

Applicable Test Standards

Standard	Title	Scope	Type
IS 460 Part 1	Test Sieves — Perforated Plate Sieves	Perforated Sieve	Indian Standard
IS 2386 Part 1	Methods of Test for Aggregates	Aggregate Testing	Indian Standard
ISO 3310-2	Test Sieves of Perforated Metal Plate	Sieve Standard	ISO
NABL-141	NABL Policy on Metrological Traceability	Traceability	NABL

Applications

Where is the Perforated Test Sieve Calibration Used?

Annual perforated sieve calibration for NABL aggregate lab

Coarse aggregate MORTH compliance sieve calibration

NHAI highway aggregate laboratory sieve schedule

Quarry QA/QC perforated sieve calibration

Pre-NABL assessment for aggregate testing scope

Sieve calibration audit for disputed grading results

Why Choose Global Lab

Our Advantages

NABL Accredited CertificatesIS 460 Part 1 perforated sieve certificates for NABL assessment.

Statistical Aperture Data10+ holes with mean and SD — not single-point.

Blocking DetectionBlocked apertures identified.

Fast 2-Day CertificateCertificate within 2 working days.

Pan-India CoverageDimensional calibration at all 7 locations.

Combined Sieve PackagePerforated + Wire cloth sieve together.

Perforated Test Sieve Calibration(IS 460 Part 1 — Perforated Plate Sieves)