Spiral type

Spiral-type heat exchange units for process and HVAC duty

BIS QCO APPLICABLE · ISI MARK SCHEME · IS 11329

HSN 8419 50 93 (spiral-type heat exchange units) is covered by a Bureau of Indian Standards Quality Control Order. Conformity to IS 11329:2018 is mandatory under the ISI Mark Scheme with effect from 01 October 2023, pursuant to the Air Conditioner and Its Related Parts Hermetic Compressor and Temperature Sensing Controls (Quality Control) Amendment Order, 2025. No separate customs-clearance overlay beyond the BIS obligation applies to this tariff line.

What this is

HSN code

8419 50 93

Chapter

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

BIS QCO

Applicable · ISI Mark Scheme · CM/L required

Indian Standard

IS 11329:2018 · effective 01-10-2023

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 11329:2018. Verify the supplier's CM/L number, licensed product scope, and licensed manufacturing facility on the BIS online register before placing the purchase order.
IS 11329:2018 · Air Conditioner and Its Related Parts Hermetic Compressor and Temperature Sensing Controls (Quality Control) Amendment Order, 2025 · S.O. 4354(E) dated 05-12-2019
2
Ensure every spiral-type heat exchange unit bears the ISI mark and the supplier's CM/L number under Scheme-I of Schedule-II to the BIS (Conformity Assessment) Regulations, 2018. The mark must appear on the unit itself, not on packaging alone.
Scheme-I of Schedule-II to the BIS (Conformity Assessment) Regulations, 2018 · Air Conditioner and Its Related Parts Hermetic Compressor and Temperature Sensing Controls (Quality Control) Amendment Order, 2025
3
Obtain and retain the manufacturer's test documentation demonstrating conformity to IS 11329:2018, covering construction, performance, and safety requirements for the spiral heat-exchanger configuration being imported.
IS 11329:2018 · BIS (Conformity Assessment) Regulations, 2018
4
Quote the supplier's BIS CM/L number on the bill of entry. Customs verifies the CM/L in real time against the BIS register; an absent, expired, or scope-mismatched licence triggers consignment detention.
BIS Act, 2016 · Customs Act, 1962 · S.O. 4354(E) dated 05-12-2019
5
Assess whether the consignment qualifies for an exemption under paragraph 2 of S.O. 4354(E) or its amending notifications. If an exemption applies, prepare and retain the documentary basis before customs filing.
S.O. 4354(E) dated 05-12-2019 as amended by S.O. 1518(E), S.O. 4671(E), S.O. 5095(E), S.O. 5972(E), S.O. 32(E), S.O. 695, and S.O. 1815(E)

A word of counsel

The most common error on this tariff line is assuming that the IS 11329:2018 scope covers the full family of heat exchangers described in the IS standard title — shell-and-tube, plate, brazed-plate, and spiral — when the CCR anchors the QCO specifically to finned-type heat exchangers for room air conditioners. An importer sourcing a spiral-type unit for process or refrigeration duty must confirm with counsel and the BIS register that the CM/L on offer actually covers spiral configuration before contracting, because a CM/L issued only for finned-coil geometry does not satisfy the import obligation for spiral units.

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Frequently asked

Does HSN 8419 50 93 require BIS certification?

Yes. Spiral-type heat exchange units under this tariff line must conform to IS 11329:2018 under the ISI Mark Scheme, with effect from 01 October 2023; import is permitted only from manufacturers holding a current BIS CM/L licence covering the spiral configuration.

Which Quality Control Order governs this tariff line?

The Air Conditioner and Its Related Parts Hermetic Compressor and Temperature Sensing Controls (Quality Control) Amendment Order, 2025, made operative through S.O. 4354(E) dated 05-12-2019 and its subsequent amending notifications, is the controlling QCO.

Are any consignments exempt from the IS 11329:2018 requirement?

Exemptions are available under paragraph 2 of S.O. 4354(E) as amended. The specific exemption basis must be documented before customs filing; the amending notifications S.O. 1518(E), S.O. 4671(E), S.O. 5095(E), S.O. 5972(E), S.O. 32(E), S.O. 695, and S.O. 1815(E) carry successive updates.

Does a single CM/L licence cover all heat-exchanger configurations from the same manufacturer?

No. A CM/L licence is scope-specific by product configuration and manufacturing facility; a licence issued for one heat-exchanger geometry does not cover spiral-type units unless that configuration is explicitly stated in the licensed scope.

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