Safety or relief valves

Safety or relief valves for pipes, boilers and pressure vessels

BIS QCO APPLICABLE · ISI MARK SCHEME · IS 13095

HSN 8481 40 00 (safety or relief valves) is covered by a Bureau of Indian Standards Quality Control Order. Conformity to IS 13095 is mandatory under the ISI Mark Scheme; the Butterfly Valves (Quality Control) Order, 2020 applies with effect from 01 January 2021, and gas-cylinder valves must additionally comply with application-specific BIS standards under Rule 4(1) of the Gas Cylinder Rules, 2016. No separate customs-clearance overlay beyond the BIS QCO applies to this tariff line.

What this is

HSN code

8481 40 00

Chapter

84 · Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof

BIS QCO

Applicable · ISI Mark Scheme · CM/L required

Indian Standard

IS 13095 · effective 01-01-2021

Applicable Partner Government Agencies

BISBIS·Bureau of Indian Standards

Compliance steps

1
Source only from a Bureau of Indian Standards CM/L-licensed manufacturer holding a current licence against IS 13095 for butterfly valves for general purposes. Verify the supplier's CM/L number, licensed product scope, and licensed manufacturing facility on the BIS online register before placing the purchase order.
Butterfly Valves (Quality Control) Order, 2020 · S.O. 1920(E) dated 17-06-2020
2
Ensure every valve bears the ISI mark and the supplier's CM/L number in accordance with Scheme-I of the BIS (Conformity Assessment) Regulations, 2018. The marking must appear on the product itself and not solely on packaging.
Butterfly Valves (Quality Control) Order, 2020 · S.O. 1920(E) dated 17-06-2020 · BIS (Conformity Assessment) Regulations, 2018
3
Where the safety or relief valve is intended to be fitted to a gas cylinder, confirm the applicable application-specific BIS standard — IS 3224 (industrial/CNG), IS 3745 (medical gas), IS 7302 (breathing apparatus), IS 8776/IS 8737 (LPG cylinders), IS 15100 (auto LPG), IS 12300 (small refrigerant), or IS 9798 (LPG regulators). Compliance with that standard is required under Rule 4(1) of the Gas Cylinder Rules, 2016 read with Section 18 of the Explosives Act, 1884.
Rule 4(1) of the Gas Cylinder Rules, 2016 · G.S.R. 1081(E) dated 22-11-2016 · Section 18 of the Explosives Act, 1884
4
Quote the supplier's BIS CM/L number on the bill of entry. Customs verifies the CM/L against the BIS register in real time; an absent, expired, or product-scope-mismatched licence triggers consignment detention, demurrage, and potential re-export or confiscation.
Butterfly Valves (Quality Control) Order, 2020 · BIS Act, 2016 · Customs Act, 1962
5
If the valve conforms to an internationally recognised standard approved by the Chief Controller of Explosives rather than a listed BIS standard, obtain and retain documentary evidence of that approval before import. The Chief Controller approval is distinct from the BIS CM/L and must be separately documented.
Rule 4(1)(viii)-(ix) of the Gas Cylinder Rules, 2016 · G.S.R. 1081(E) dated 22-11-2016

A word of counsel

The single most common error on this tariff line is treating IS 13095 (butterfly valves for general purposes under the QCO) as the only compliance obligation, overlooking the parallel gas-cylinder-valve regime. A safety valve destined for a gas cylinder must satisfy the application-specific BIS standard — IS 3224, IS 3745, IS 8776, IS 8737, IS 9798, or another Chief-Controller-approved standard — in addition to any QCO marking obligation; arriving at port with only a general-purpose CM/L but without the cylinder-application certification results in detention and prospective monetary penalty under the Explosives Act, 1884.

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Frequently asked

Does HSN 8481 40 00 require BIS certification?

Yes. Butterfly valves for general purposes classified under this tariff line require an ISI mark and a current BIS CM/L licence against IS 13095 with effect from 01 January 2021, pursuant to the Butterfly Valves (Quality Control) Order, 2020.

Do gas-cylinder valves under HSN 8481 40 00 have additional BIS requirements beyond IS 13095?

Yes. Under Rule 4(1) of the Gas Cylinder Rules, 2016, valves fitted to gas cylinders must comply with the application-specific BIS standard for the cylinder type — for example, IS 3224 for industrial and CNG cylinders, IS 9798 for LPG regulators, or another standard approved by the Chief Controller of Explosives.

Which Quality Control Order governs this tariff line?

The Butterfly Valves (Quality Control) Order, 2020 issued vide S.O. 1920(E) dated 17-06-2020, mandating IS 13095 compliance with effect from 01 January 2021. The Gas Cylinder Rules, 2016 issued vide G.S.R. 1081(E) apply additionally for cylinder-fitted valves.

Does a single CM/L licence cover all valve sizes, pressure classes, and end-use applications?

No. A BIS CM/L licence is scope-specific by valve type, size range, pressure class, and manufacturing facility; valves outside the licensed scope, or produced at an unlicensed plant, are not covered and will be detained at customs.

Last verified against gazette notifications: 2026-05-18. Source: BIS / Indian Customs CUSDATA.