Directorate of Boilers Govt. of W.B


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Online Registration and Renewal of Cetificates of Boilers and Economisers are mandatory w.e.f. 30.05.2017.
Online Approval of Boiler Manufacturer / Erector and Renewal thereof are mandatory w.e.f. 17.08.2017.
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Standard Inspection Procedure

Standard Inspection Procedure of Boiler Directorate

Click HERE to view / download the Office Order of the Updated Standard Inspection Procedure

a) Checking Registration Number of the Boiler.

b) Carry out thorough visual inspection of boiler inside and outside after proper cleaning.

c) Checking defects like crack, erosion, corrosion, bulging, pitting, deformation of pressure parts etc.

d) Checking of thickness of pressure parts.

e) Checking of Mountings and Fittings.

f) Witnessing Non-destructive Testing if required

a) Verification of documents of pressure parts with relevant IBR certificates.

b) Verification of the approved drawings and documents.

c) Checking of the facsimile of the makers’ stamp and other identification marking with Form-II or other relevant IBR certificates.

d) Checking of the leading dimension of the pressure parts with the approved drawing.

e) Checking of the general condition of the pressure parts (like denting, deformation, crack pitting etc.).

f) Checking of all Mountings and Fittings with relevant IBR document.

a) Verification of the approved drawing corresponding to the material and documents.

b) Checking of the pressure part material with relevant IBR certificate and approved drawing (Name of Part, Material Specification, Heat No., Cast No., Class, Size, Identification Number, Stamping etc.)

c) Checking of leading dimension of the pressure parts with the approved drawing.

d) Checking of the general condition of the pressure parts visually.

e) Selection of Samples for Physical and Chemical testing if required.

a) Verification of the approved drawing.

b) Verification of the Welder’s Certificate.

c) Verification of the certificates of the Welding Consumables.

d) Verification of the approval of the Contractor for the particular job.

e) Verification of the approved Welding Procedure Specification.

f) Verification of the satisfactory result of the site Simulation Test.

g) Verification of the satisfactory Check Test result of the pipe/tube/plate.

h) Checking of the Root gap, Weld groove profile, Alignment of the pressure parts to be welded as per approved drawing etc.

i) Ensure weld joint area to be free from rust, scale, oil, grease, crack etc.

j) Check provision for baking of electrode for low hydrogen electrode.

k) Check weld joint identification number.

a) Visual inspection for checking the general condition of welding (like Spatter, Undercut, Reinforcement, Surface Crack, Leg length, Surface condition etc.)

b) Checking alignment of the pressure parts.

c) Witnessing Magnetic Particle Test, Dye Penetrant Test, Hardness Test etc. if required.

d) Selection of welded joints for Non-destructive Testing like Radiographic Testing, Ultrasonic Testing etc.

a) Verification of the satisfactory Non-destructive Testing report of the welded joints.

b) Verification of the Positive Material Identification (PMI) Report.

c) Verification of the Pressure Parts Calculation approval.

d) Verification of all previous Inspection Reports and PWHT Charts.

e) Checking of calibration certificate of pressure gauge.

f) Witnessing Hydraulic Test carried out as per Indian Boiler Regulations. 1950.

g) Checking of Deflection, Distortion and extension of pressure parts during Hydraulic Test.

h) Thorough Checking of the pressure parts during Hydraulic Test for detecting any leakage or sweating.

a) Verification of the Provisional Order of the Boiler.

b) Witnessing the Steam Test as per Indian Boiler Regulations, 1950.

c) Checking of the Popping Pressure, Reset Pressure, Percentage Blow Down, Accumulation, Lift, Chattering etc. during Steam Test.

d) Checking of the performance of all Mountings and Fittings during Steam Test.

a) To carry out thorough visual inspection.

b) Checking dimension and configuration as per approved drawing.

c) Check the Identification Mark on the job.

d) Stamp the pressure part with the Official Seal (Ashoka Emblem).

a) Witness forming process as per approved drawing.

b) Check starting and finishing temperature of forming operation, R/D ratio, ovality for tube/pipe, forging ratio etc. as per approved drawing.

c) Suggest post forming heat treatment, if required.

d) Select and stamp test pieces for check test.

e) Review heat treatment chart and all testing reports.

f) Carry out visual inspection, hardness, thickness test etc. and measure final dimension as per approved drawing.

g) Check the identification mark and stamp it with the official seal (Ashoka Emblem).

a) Verification of the following reference documents:

i) P&I Diagram

ii) Feed pump characteristic curve

iii) Flexibility analysis report

iv) Copy of existing drawing.


b) Checking of title block with the following:


i) Owners / Makers name and address.

ii) Title of drawing

iii) Drawing No. and revision No.


c) Checking of the following Design data:


i) Code of design, inspection and testing.

ii) Design Pressure of component.

iii) Design Temperature of component.

iv) Hydraulic test pressure.

v) Related boiler Number.

vi) Boiler design pressure.

vii) Boiler design temperature.


d) Notes to be checked:


i) Process of forming

ii) Post forming heat treatment requirement.

iii) Testing of welded joints.

iv) Post weld heat treatment requirement.

v) Location of hydraulic test.

vi) Slope of piping.

vii) Revision Note


e) Bill of materials to be checked:


i) Part Number.

ii) Description of part.

iii) Size or Dimension of part (O/D, thickness, length etc.) in mm.

iv) Quantity of material.

v) Class / Rating of part etc.


f) Other details to be checked:


i) Design Criteria.

ii) Selection of proper material

iii) Strength calculation.

iv) Part no. marking.

v) Support type and location.

vi) Drainage.

vii) Venting.

viii) Direction of flow.

ix) Reference welding figure no with configuration.

a) Scrutiny if Submitted Documents.

b) Inspection of Premises, Verification of Manpower along with their Experience and Machineries.

c) Submission of Report

d) Technical Discussion.

e) Issuance of Recognition Certificate.

a) Scrutiny if Submitted Documents.

b) Inspection of Premises, Verification of Manpower along with their Experience and Machineries.

c) Submission of Report

d) Technical Discussion.

e) Issuance of Recognition Certificate.