Design & Specification

Working Principle:
A body with conical seat, a nut & a ferrule when assembled on a tube forms a joint. On progressively tightening the nut on the body,
the ferrule bites into the outer surface of the tube, thereby ensuring leak-proof joint at high operating pressures.

HF Flareless Bite Type Fitting are available from 6mm OD of tube to 42mm OD of tube in low pressure series i.e. ‘L’ and 6mm OD to tube to 38mm OD of tube in high pressure series i.e. ‘S’. These are also available for use with Nominal Bore of tube from 1/8″ to 1-1/2″ and OD of tube from 3/16″ to 2″.

Design and Construction:
Flareless Bite Type Fittings consist of three components which are manufactured to produce a strong and leak-proof joint on proper assembly. The three components are as follows:

1. Body: HF fitting bodies are available in many configurations. The straight products are made from cold drawn bars. The shaped products such as Tees, Elbows etc. are mostly hot forged. They are further machined to size as per specifications.

2. Ferrule: HF fittings are precision machined & heat treated to ensure proper biting and vibration dampening in the assembly.

3. Nut: HF nuts are either cold formed, hot formed or machined to size from cold drawn material.

HF fittings confirm to IS:8805-1978


Body & Nut: Carbon Steel
Ferrule: Heat treated Carbon Steel
Surface Protection: Blackened/Zinc Plated
Working Pressure: Refer Individual Table
Working temp. range: -10 °C to + 120 °C
Test Procedure: As per IS 10103 (P-II):1982
Intended for tubes: Confirming to DIN 2391/C or equivalent