SMS fittings are named from Swedish Dairy Standard ( Svensk MeieriStandard )
There are a multitude of variants in pipe-clips and clamps and couplings and unions that is commonly used all over Europe.
There are several other standards, DS (Danish Standard) and the Germans have several DIN standards such as DIN 11851 & 11887 and probably many others.
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Use fittings.
No. You can use flared fittings with a flaring tool and soft copper pipe.
A106 is for pipes and A234 is for Fittings, as well as A105 are for forgings.
I.S.CODES RELATED TO DUCTILE IRON PIPES IS 9523:1980 Ductile Iron fittings for pressure pipes for water, gas and sewageIS 8329:1977 Centrifugally cast (spun) Ductile Iron pressure pipes for water, gas and sewage IS 12288:1987 Code of practice for laying of Ductile Iron pipes Got it ! OK !
WP is used in front of the grades for pipe fittings after the production standard. Like ASTM A403 WP304L. TP is used in front of the grades for pipes (not fittings) after the production standard. Like ASTM A312 TP304L.