Overview of MIL-STD-1689A Welding Standards

MIL-STD-1689A

Welding and brazing procedure and performance qualifications.

Welding Procedure Qualification

To make sure welds meet Navy quality and safety standards.

WPS

Welding Procedure Specification

PQR

Procedure Qualification Record

WPS Contents

Steps, materials, and settings used to make a proper weld.

Welding Procedure Approval

A qualified welding engineer or authority.

Performance Qualification

A test to prove a welder can make sound welds.

Welder Requalification Frequency

When they haven't welded in 6 months or after failing a test.

Welder Qualification Records

Their qualification test records.

Visual Inspections

To check weld appearance and detect surface flaws.

NDT Methods in MIL-STD-1689A

Visual, Radiographic (RT), Liquid Penetrant (PT), Magnetic Particle (MT), Ultrasonic (UT)

Radiographic Testing Requirement

For critical joints or where internal flaws matter.

Welder Test Failure Consequence

They must retrain and retest before welding again.

Acceptable Weld Discontinuity

Minor imperfections that do not affect strength.

Weld Inspection Failure Response

The weld must be repaired or redone.

Base Metals Covered

Carbon steel, stainless steel, copper-nickel, and more.

PQR Documentation

All variables used during welding and test results.

Filler Metal Importance

It affects strength and compatibility with base metal.

Preheating Purpose

Heating metal before welding to reduce cracking.

Post-Weld Heat Treatment

Heating after welding to relieve stress.

Joint Fit-Up Importance

Poor fit-up can cause weak or failed welds.

Acceptance Criteria for Welds

Rules that define what defects are allowed.

Weld Coupon

A sample piece used for testing weld quality.

Brazing Procedure Qualification

By test joints inspected for leaks and strength.

Common Brazing Metals

Copper, brass, stainless steel.

Welding Operation Interruption Authority

Any QA inspector or supervisor noticing a problem.

Main Goal of MIL-STD-1689A

Ensure safe, strong, and consistent welds on Navy systems.