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IS 10677:2004 is the Indian Standard (BIS) for copper and copper alloy fittings for plumbing - specification. This standard specifies the requirements for materials, dimensions, manufacturing, and performance testing for wrought copper and cast copper alloy solder-type fittings used in plumbing. It covers a wide range of fittings like elbows, tees, and couplings intended for use with copper tubes in water supply systems.
Specifies the requirements for copper and copper alloy fittings suitable for use in plumbing installations.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Ensure fittings carry the ISI mark as a confirmation of quality and compliance with the standard.
! These fittings are intended for joining by soldering or brazing; proper surface preparation and flux application are critical for a leak-proof joint.
! Verify the fitting material (wrought copper or cast alloy) is appropriate for the intended service pressure and environment.
Consolidated list per BIS. For the text of each amendment, refer to the BIS portal link above.
coppercopper alloybrassgunmetal
International Equivalents
Similar International Standards
ASME B16.22-2018American Society of Mechanical Engineers (ASME), USA
HighCurrent
Wrought Copper and Copper Alloy Solder Joint Pressure Fittings
Covers wrought copper fittings for solder-joint connections in pressure piping systems, similar to the wrought portion of IS 10677.
ASME B16.18-2018American Society of Mechanical Engineers (ASME), USA
HighCurrent
Cast Copper Alloy Solder Joint Pressure Fittings
Covers cast copper alloy fittings for solder-joint connections, mirroring the cast portion of IS 10677.
EN 1254-1:2021European Committee for Standardization (CEN), Europe
HighCurrent
Copper and copper alloys — Plumbing fittings — Part 1: Fittings with ends for capillary soldering or capillary brazing to copper tubes
Specifies requirements for capillary solder/braze fittings, directly overlapping with the primary fitting type in IS 10677.
AS/NZS 3688:2016Standards Australia / Standards New Zealand, Australia/New Zealand
MediumCurrent
Water supply and gas systems — Metallic fittings and end connectors
Broader scope including gas and other metals, but its requirements for copper alloy water fittings are comparable.
Key Differences
≠IS 10677 consolidates requirements for both wrought and cast fittings in a single document, whereas ASME separates them into two standards: ASME B16.22 (wrought) and ASME B16.18 (cast).
≠Material designations are different. IS 10677 uses Indian grades like Cu-DHP and LTB 2, while ASME/ASTM uses UNS numbers (e.g., C12200, C84400) and EN uses its own alpha-numeric system (e.g., CW024A).
≠For threaded fittings, IS 10677 references IS 554 (BSP threads), while ASME standards specify ASME B1.20.1 (NPT threads). These thread forms are not interchangeable.
≠ASME standards provide detailed pressure-temperature rating tables for various service conditions, which are more comprehensive than the specific test pressure values mandated in IS 10677.
Key Similarities
≈All standards cover fittings intended for the same primary application: potable water plumbing and pressure piping systems.
≈The primary joining method specified is the capillary solder joint (solder cup), which is a fundamental design feature across IS 10677, ASME B16.18/B16.22, and EN 1254-1.
≈All standards mandate essential quality control tests, including hydrostatic pressure testing for leak integrity and porosity testing for cast fittings.
≈The types of materials specified are analogous, typically high-purity wrought copper (like Phosphorus Deoxidized Copper) and cast copper alloys like gunmetal or leaded red brass for their corrosion resistance and strength.
≈All listed standards require fittings to be permanently marked with the manufacturer's name or trademark and nominal size for traceability and identification.
Parameter Comparison
Parameter
IS Value
International
Source
Wrought Copper Material
Cu-DHP as per IS 191 (Part 5)
UNS C12200 (Phosphorus Deoxidized, High Residual Phosphorus)
ASME B16.22-2018
Cast Copper Alloy (Gunmetal)
Grade LTB 2 as per IS 318
UNS C84400 (Leaded Red Brass)
ASME B16.18-2018
Hydrostatic Test Pressure
1.5 MPa for 2 minutes (for all fittings)
1.5 times the 100°F pressure rating of the fitting. (e.g., ~2.07 MPa / 300 psi for a Class 125/200 WOG fitting)
ASME B16.18-2018
Porosity Test for Cast Fittings (Pneumatic)
0.6 MPa (approx. 87 psi) under water with no leakage
Not less than 0.4 MPa (60 psi) under water with no leakage
ASME B16.18-2018
Pipe Thread Type
Taper or parallel pipe threads as per IS 554 (based on BSP)
Taper pipe threads as per ASME B1.20.1 (NPT)
ASME B16.18-2018
Lead (Pb) Content in Cast LTB 2 Alloy
3.0% – 5.0%
6.0% – 8.0% (for UNS C84400)
ASME B16.18-2018
Solder Cup Tolerance
Specified in Table 4 of the standard (e.g., for 15 mm tube, cup dia is 15.09-15.19 mm)
Specified in tables (e.g., for 1/2 in. tube, cup dia is 0.503-0.507 in. or 12.78-12.88 mm)
ASME B16.22-2018
⚠ Verify details from original standards before use
Key Values4
Quick Reference Values
Hydrostatic Test Pressure1.7 MPa for 10 seconds
Minimum Copper Content (DHP Grade)99.90 %
Tolerance on Angles± 1 degree
Stress Relief Temperature (Wrought Fittings)250 to 280 °C
Tables & Referenced Sections
Key Tables
Table 1: Chemical Composition of Cast Copper Alloy Fittings
Table 2: Hydrostatic Test Pressures
Tables 3 to 22: Dimensions of various types of fittings (e.g., Elbows, Tees, Couplings)
What is the mandatory pressure test for these fittings?+
Each fitting must withstand a hydrostatic pressure of 1.7 MPa (approx. 17.3 kgf/cm²) for at least 10 seconds without showing any signs of leakage (Clause 7.1).
What materials are permitted for these fittings?+
The standard allows for wrought seamless copper (conforming to IS 2501) and various cast copper alloys like Leaded-Tin Bronze (Gunmetal) and Brass (Clause 4).
What markings should be present on a compliant fitting?+
Fittings must be marked with the manufacturer's name or trademark and the ISI Certification Mark (Clause 11).
Are these fittings suitable for gas pipelines?+
No, this standard is specifically for plumbing and water services. Fittings for gas applications are covered by other specific standards.