We’ve been selling stainless steel fittings since the day we opened, Feb 1, 1980. At that time everything we sold was made in the USA. In the mid 1980’s imports from Asia started pouring into the country, some with prices (and quality) 90% below those made in the US.
Prior to 1995 there were no published standards for stainless steel threaded fittings. Domestic manufacturers made their fittings to the same size, dimensions and thicknesses as iron fittings (ANSI B16.3.) Import manufacturers produced them with various dimensions and tolerances. Each had different alignment dimensions, wall thicknesses and variations in chemical characteristics.
Today you can purchase Class 150 Stainless Steel fittings that vary from very light weight, thin, low pressure fittings, to those made to the ANSI B16.3 standards and to the MSS SP-114 standard. As to be expected, the light weight fittings cost less and may be suitable for limited applications like a home brewery or fish pond.
Unfortunately these light weight fittings are sometimes mistakenly purchased for industrial applications.
Most Class 150 threaded Stainless fittings sold today do not meet the MSS SP-114 standards.
Even though the MSS SP-114 standard was created 20 years ago, today most Class 150 import stainless steel fittings are made to the ANSI B16.3. And unless specified, the ANSI B16.3 fitting is typically supplied by reputable distributors.
If you have a critical application or just want to be sure, specify MSS SP-114 when ordering your Class 150 or Class 1000 Stainless Steel Fittings.
Need help selecting the right specification for your needs? Give us a call!