Pressure-reducing valves

Pressure-reducing valves for pipes, cylinders and containers

BIS QCO APPLICABLE · ISI MARK SCHEME · IS 3224

HSN 8481 10 00 (pressure-reducing valves) is covered by a Bureau of Indian Standards Quality Control Order. Conformity to the applicable Indian Standard is mandatory under the ISI Mark Scheme; cylinder valves have been subject to BIS compliance requirements under the Gas Cylinders Rules, 2016 since 22 November 2016, and butterfly valves for general purposes under the Butterfly Valves (Quality Control) Order, 2020 with effect from 01 January 2021. No separate customs-clearance overlay applies beyond the BIS ISI Mark Scheme obligation.

What this is

HSN code

8481 10 00

Chapter

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

BIS QCO

Applicable · ISI Mark Scheme · CM/L required

Indian Standard

IS 3224 · effective 22-11-2016

Applicable Partner Government Agencies

BISBIS·Bureau of Indian Standards

Compliance steps

1
Identify which Indian Standard governs the specific valve type being imported before sourcing: IS 3224 (industrial gas and CNG on-board cylinder valves), IS 3745 (medical gas cylinder valves), IS 7302 (breathing apparatus valves), IS 8776 (LPG cylinders up to 5 litres), IS 8737 (LPG cylinders over 5 litres), IS 15100 (auto LPG containers), IS 12300 (small refrigerant cylinders), IS 9798 (LPG regulators), or IS 13095 (butterfly valves for general purposes).
Gas Cylinders Rules, 2016 · G.S.R. 1081(E) dated 22-11-2016 · Section 18 of the Explosives Act, 1884 · Butterfly Valves (Quality Control) Order, 2020 · S.O. 1920(E) dated 17-06-2020
2
Source only from a Bureau of Indian Standards CM/L-licensed manufacturer holding a current licence against the applicable IS number and scope. Verify the supplier's CM/L number, licensed product scope, and manufacturing facility address on the BIS online register before placing the purchase order.
Gas Cylinders Rules, 2016 · G.S.R. 1081(E) dated 22-11-2016 · Butterfly Valves (Quality Control) Order, 2020 · S.O. 1920(E) dated 17-06-2020
3
Ensure each valve bears the ISI mark and the supplier's CM/L number, traceable to the licensed manufacturing facility. Marking must appear on the product itself; marking only on outer packaging does not satisfy the statutory requirement.
BIS (Conformity Assessment) Regulations, 2018 · Scheme-I marking requirements
4
Quote the supplier's BIS CM/L number and the applicable IS number on the bill of entry. Customs verifies the CM/L against the BIS register in real time; an absent, expired, or scope-mismatched licence triggers consignment detention, demurrage, and potential re-export or confiscation.
BIS Act, 2016 · Customs Act, 1962 · Gas Cylinders Rules, 2016 · G.S.R. 1081(E) dated 22-11-2016
5
For butterfly valves for general purposes, confirm separately that the CM/L is current against IS 13095 with effect from 01 January 2021. This obligation arises under a distinct Quality Control Order and must be verified independently of the cylinder-valve standards.
Butterfly Valves (Quality Control) Order, 2020 · S.O. 1920(E) dated 17-06-2020

A word of counsel

The predominant compliance failure on HSN 8481 10 00 is presenting a single CM/L licence number at the port without confirming whether its licensed scope covers the exact valve type and gas-service category in the consignment. A CM/L against IS 3224 (industrial gas cylinder valves) does not cover LPG cylinder valves under IS 8776 or IS 8737, nor does it cover butterfly valves under IS 13095 — each IS number demands its own licence scope entry. Customs' real-time register check exposes every scope mismatch, and a detained consignment of valves destined for pressure systems cannot be remediated without re-export or destruction.

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Frequently asked

Does HSN 8481 10 00 require BIS certification?

Yes. Pressure-reducing and cylinder valves under this tariff line require Bureau of Indian Standards certification under the ISI Mark Scheme; the applicable Indian Standard depends on the specific valve type and gas-service category, with IS 3224 as the primary standard for industrial gas and CNG cylinder valves.

Do butterfly valves for general purposes under IS 13095 have a different enforcement date from cylinder valves?

Yes. Cylinder valve compliance under G.S.R. 1081(E) applies from 22 November 2016; butterfly valves for general purposes under the Butterfly Valves (Quality Control) Order, 2020 are subject to BIS compliance from 01 January 2021 per S.O. 1920(E) dated 17-06-2020.

Does one CM/L licence cover all valve types falling under HSN 8481 10 00?

No. Each Indian Standard — IS 3224, IS 3745, IS 7302, IS 8776, IS 8737, IS 15100, IS 12300, IS 9798, and IS 13095 — requires a separate CM/L scope entry; a licence covering one valve category does not extend to another.

Is the CM/L licence facility-specific for pressure-reducing valve manufacturers?

Yes. A CM/L licence is issued per manufacturing facility; valves produced at a plant not covered by the licensed facility address are outside the CM/L scope, and customs detects the mismatch against the BIS online register.

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