AS 4041-1998

Specifies minimum requirements for the materials, design, fabrication, testing, inspection, reports and pre-commissioning of piping subject to internal pressure or external pressure or both. Specific requirements are given for piping constructed of carbon, carbon-manganese, low alloy and high alloy steels, ductile and cast iron, as well as copper, aluminium, nickel, titanium and alloys of these materials. General requirements and reference to Standards for non-metallic piping are included. A method for Standard piping design without the need for calculations is given in Appendix T.

This Standard sets out minimum requirements for the materials, design, fabrication, testing, inspection, reports and pre-commissioning of piping subject to internal pressure or external pressure or both. Specific requirements are given for piping constructed of carbon, carbon-manganese, low alloy and high alloy steels, ductile and cast iron, copper, aluminium, nickel, titanium and alloys of these materials. General requirements and reference to Standards for non-metallic piping are included.
Piping complying with BS 806, ANSI/ASME B31.1, ANSI/ASME B31.3 and ANSI/ASME B31.5 are deemed to meet the requirements of this Standard (see Clause 1.6). This Standard applies specifically to pressure piping, i.e. piping which may present a significant risk of injury to people, property or the environment owing to hazards arising from-(a) the effects of pressure, either as a result of internal pressure causing an explosion or projectile, or as a result of external pressure causing buckling and collapse; (b) release of contents which are lethal, toxic, harmful to human tissue (e.g. hot, cold, corrosive) flammable, combustible or are otherwise hazardous; or (c) release of contents which directly or indirectly result in injury or damage e.g. piping for pollutants, fire-fighting purposes or cooling purposes.
This Standard is intended to apply to the following piping except when varied by the relevant Standard: (i) Piping for land steam boilers, prime-movers, refrigerant and other industrial plant except where the piping forms an integral part of a boiler or pressure vessel and the requirements of AS 1210 or AS 1228 apply.
(ii) Hydraulic piping, water piping (including feed water piping), process piping, hot water piping exceeding 99°C and water piping forming part of a fire protection system (see AS 3689 and AS 4118). See also Items (A) to (G) of this Clause.
(iii) Piping within boundaries of chemical manufacturing or processing installations, petroleum refineries, petrochemical plant, gas process plant, refinery tank farms, terminals and bulk handling plants.
(iv) Oil fuel piping within the scope of AS 1375, AS 1692 and AS 1940. (v) Liquefied petroleum gas piping within the scope of AS 1596. (vi) Anhydrous ammonia within the scope of AS 2022.
(vii) Low-temperature and refrigeration piping within the scope of AS 1677. (viii) Piping for road tank vehicles within the scope of AS 2809.
(ix) Compressed air piping, the design pressure of which exceeds 70 kPa (internal) or 32 kPa (external).
(x) Piping for low pressure gas systems complying with AG 601.
(xi) Other piping covered by Standards Australia Standards which require compliance with this Standard.
This Standard may be applied beyond the limits of application of Items (i) to (xi) where specified by the purchaser. Unless suitably referenced this Standard is not intended to apply to the following:
(A) Gas and liquid petroleum pipelines covered by AS 2885.
(B) Gas distribution pipelines covered by AS 1697 for Australia or NZS 5258 for New Zealand.
(C) Liquid hydrocarbon pipelines with operating pressure less than 2 MPa which are covered by AS 2018.
(D) Piping on shipping and aircraft.
(E) Piping used for roof or floor drains, plumbing services, sewers, domestic water and gas reticulation, and low pressure ventilation ducting.
(F) Mineral slurry pipelines which are covered by ANSI/ASME B31.11.
(G) Nuclear piping.

First published in part as part of AS B65-1943 (being endorsement of BS 806-1954 with Amendments).
Second edition 1955 (being endorsement of BS 806:1954 with Amendments).
AS CB15 first published 1959.
AS B65-1955 revised and redesignated in part as AS CB18.1-1967.
AS CB15-1959 revised and redesignated AS CB15.1-1970 and AS CB15.3-1967.
AS CB18.1 Int1 first published 1971.
AS 1135 first published 1973.
AS CB15.1-1970, AS CB15.3-1967, AS CB18.1-1967, AS CB18.1 Int1-1971 and AS 1135-1973 revised, amalgamated and redesignated AS 4041-1992.
Second edition 1998.