🔄 DGMS Renewal of Approval – Validity, Conditions & Compliance Rules 

DGMS approval is not permanent. Every equipment manufacturer must apply for renewal before the approval expiry date, or the equipment becomes illegal to use in Indian mines. This blog covers validity periods, renewal conditions, factory inspections, required documents, reasons for delay/rejection, and DGMS rules — written in OME style.

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🔹 1. Why Renewal Is Necessary?

Renewal ensures:

• Equipment still meets safety standards
• No unauthorized modifications were made
• Manufacturer maintains ISO 9001 QMS
• Factory continues to produce equipment as per approved design
• Equipment performance remains satisfactory in mines

DGMS requires renewal because mining environment is high-risk and safety equipment must remain compliant.

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🔹 2. Validity of DGMS Approvals

Equipment Category	Renewal Validity
Flameproof (FLP) equipment	5 years
Intrinsically Safe (IS) devices	3–5 years
Rescue equipment (SCSR/BG sets)	3 years
Explosives & detonators	1–2 years
PPE (helmets, shoes)	2–3 years
Provisional approval	6–12 months

Expired approval = not permitted in mines.

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🔹 3. When Should Renewal Be Applied? Manufacturers must apply:

• At least 90 days before expiry
• With complete documentation
• Through the DGMS online system (where available)

Late submission may lead to:

• Lapse of approval
• Mandatory fresh testing
• Temporary ban from supplying equipment

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🔹 4. Renewal Application Process 

  Manufacturer → Submit Renewal Form L ↓ DGMS Document Scrutiny ↓ Testing (if required) ↓ Factory Audit ↓ Performance Review ↓ Renewal Approval / Rejection

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🔹 5. Documents Required for Renewal 

  ⭐ Mandatory Documents

• Form L – Application for renewal
• Copy of existing DGMS approval (Form K)
• Updated BIS license
• Updated QAR/QAN certificates
• Recent factory audit reports
• Routine test reports
• List of equipment supplied in last approval period
• Performance report from mines
• Declaration of no design change

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🔹 6. Performance Report Requirements Manufacturers must submit:

• Mines using the equipment
• Running hours
• Failure history
• Maintenance records
• Any accidents/incidents
• Corrective actions taken
• Service compliance

If equipment shows poor performance, DGMS may:

• Delay renewal
• Order re-testing
• Restrict usage
• Suspend approval

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🔹 7. DGMS Factory Inspection for Renewal DGMS verifies:

• Production line
• Calibration of instruments
• Quality control
• Material certification
• Routine testing process
• Approved design vs manufactured design
• Traceability of parts

Non-compliance may stop renewal.

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🔹 8. Re-Testing Requirements 

 DGMS may order retesting if:

• Standard has been revised
• Design was modified
• Safety concerns reported
• Factory failed audit
• Major complaints filed

Retesting is done at:

• CIMFR
• ERTL
• ETDC
• CPRI

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🔹 9. Conditions for Granting Renewal DGMS grants renewal only if: 

 ✔ No modification done without approval
✔ Manufacturer maintains QMS
✔ Equipment performance is satisfactory
✔ Field feedback is positive
✔ All required tests passed
✔ BIS certification is valid
✔ Factory audits are satisfactory

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🔹 10. Grounds for Rejection of Renewal DGMS may reject renewal for:

• Poor equipment performance
• Failure in underground trials
• Complaints from mine management
• Expired BIS license
• Modified design without permission
• Non-submission of QAR/QAN
• Fake test certificates
• Safety non-compliance

Rejection results in:

• Equipment becoming illegal
• Mandatory fresh approval
• Possible blacklisting

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🔹 11. Renewal vs Fresh Approval

Feature	Renewal	Fresh Approval
When required	Before expiry	After expiry / New equipment
Testing requirement	Sometimes	Always
Factory audit	Mandatory	Mandatory
Field trials	Rare	Common
Cost	Lower	Higher
Time	Shorter	Longer

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🔥  25 MCQs (DGMS Exam Pattern) with Answers

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1) Renewal application is submitted using — a) Form B
b) Form K
c) Form L
d) Form M
e) None
Ans: c

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2) Flameproof approval validity —

a) 1 year
b) 3 years
c) 5 years
d) Lifetime
e) None
Ans: c

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3) Renewal must be applied —

a) After expiry
b) 90 days before expiry
c) During trial
d) When DGMS calls
e) None
Ans: b

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4) Renewal ensures —

a) Brand promotion
b) Colour matching
c) Safety compliance
d) Salary revision
e) None
Ans: c

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5) Field performance reports are submitted by —

a) Workers
b) Accountants
c) Manufacturer
d) Police
e) None
Ans: c

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6) DGMS may deny renewal if —

a) Equipment is too good
b) Company is big
c) Safety concerns exist
d) Colour is blue
e) None
Ans: c

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7) Renewal requires updated —

a) GST return
b) QAR/QAN
c) Menu card
d) Bank guarantee
e) None
Ans: b

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8) Retesting may be required when —

a) Customer happy
b) Festival
c) Standards changed
d) Newspaper says so
e) None
Ans: c

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9) Factory inspection for renewal checks — a) Cafeteria
b) Landscaping
c) Production & QC
d) Attendance
e) None
Ans: c

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10) Renewal applies to —

a) New designs
b) Training
c) Existing DGMS approvals
d) Coal grade
e) None
Ans: c

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11) Renewal rejected if —

a) Perfect performance
b) No complaints
c) Improper factory audit
d) Good QMS
e) None
Ans: c

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12) Renewal required for —

a) Stationery
b) FLP/IS equipment
c) Cement
d) Sand
e) None
Ans: b

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13) Renewal failure results in —

a) Gift
b) Promotion
c) Approval lapse
d) Overtime
e) None
Ans: c

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14) Equipment becomes illegal when —

a) Colour changed
b) Approval expires
c) New operator hired
d) Truck purchased
e) None
Ans: b

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15) DGMS ensures renewal only if —

a) More profit
b) more employees
c) No safety violations
d) Free lunch
e) None
Ans: c

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16) Renewal testing done at —

a) School
b) Park
c) CIMFR/ERTL/CPRI
d) Restaurant
e) None
Ans: c

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17) Validity of respirators/SCSR —

a) 1 year
b) 2 years
c) 3 years
d) 10 years
e) None
Ans: c

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18) Renewal requires —

a) Updated BIS license
b) Factory audit
c) Performance data
d) All of the above
e) None
Ans: d

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19) DGMS may grant conditional renewal when —

a) Safety minor issues exist
b) Customer angry
c) Fuel expensive
d) None
Ans: a

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20) Renewal not granted if —

a) Company ISO-certified
b) Design changed without approval
c) No complaints
d) Good QC
e) None
Ans: b

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21) Renewal used for —

a) Pay revision
b) Continuing approval validity
c) Payroll
d) Survey
e) None
Ans: b

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22) Expired approval requires —

a) Party
b) Fresh approval
c) Extra tax
d) Nothing
e) None
Ans: b

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23) Renewal failure may lead to —

a) CGWA notice
b) Ban on equipment
c) Extra lighting
d) New shoes
e) None
Ans: b

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24) Routine test reports are —

a) Optional
b) Mandatory
c) Not needed
d) Submitted by dealer
e) None
Ans: b

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25) Renewal enhances —

a) Fashion
b) Power
c) Mine safety and compliance
d) Decoration
e) None
Ans: c

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🔚 Conclusion 

DGMS Renewal of Approval is a critical compliance process that ensures:

• Equipment continues to be safe
• Quality standards remain intact
• Factory production matches approved designs
• Mines operate legally and safely

Manufacturers must strictly follow DGMS renewal norms to avoid legal penalties and maintain credibility in mining operations.

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