ISO (International Organization for Standardization) is the world’s largest developer of voluntary International Standards. International Standards give state of the art specifications for products, services and good practice, helping to make industry more efficient and effective. Developed through global consensus, they help to break down barriers to international trade. What we do ISO develops International Standards. We were founded in 1947, and since then have published more than 19 000 International Standards covering almost all aspects of technology and business. From food safety to computers, and agriculture to healthcare, ISO International Standards impact all our lives. Story of ISO The ISO story began in 1946 when delegates from 25 countries met at the Institute of Civil Engineers in London and decided to create a new international organization ‘to facilitate the international coordination and unification of industrial standards’. In February 1947 the new orga...

The  British Standard Pipe  (BSP) is a family of standard screw thread types that has been adopted internationally for interconnecting and sealing pipe ends by mating an external (male) with an internal (female) thread. Two types of threads are distinguished: BSPT : British Standard Pipe Taper -also known as “R” or “Rc” threads BSPP : British Standard Pipe Parallel -also known as “G” or “Rp” threads Parallel (‘straight’) threads, British Standard Pipe Parallel thread (BSPP; originally also known as British Standard Pipe Fitting thread/BSPF and British Standard Pipe Mechanical thread/BSPM), which have a constant diameter; denoted by the letter G. Taper threads, British Standard Pipe Taper thread (BSPT), whose diameter increases or decreases along the length of the thread; denoted by the letter R. These can be combined into two types of joints: Jointing threads: These are pipe threads where pressure-tightness is made through the mating of two threads together. The...

The process of A234 WPB pipe fittings manufacturing is called “wrought” which means it could be casted or forged. Usually the ASTM A234 WPB elbows , tees, reducers are made from steel pipes,the caps are made from plates. But the large sizes pipe fittings are commonly manufactured in pieces and welded together . ASTM A234 is standard of the pipe fitting material. However, this is indicating the properties of the material of various kinds of alloy steel and carbon steel. WPB is a steel grade in which W stands for weldable, B is grading B and P stands for pressure. Thus it is referring  minimum yield strength . What is ASTM A234 WPB ASTM A234 is Standard Specification for steel pipe fittings includes carbon and alloy steel material for moderate and high temperature services. It covers steel fittings of seamless and welded types. Steel Pipe fittings are applied in pressure pipelines and in pressure vessel fabrications. These fittings material consist of killed steel, forgings,...

ANSI/ASME B16.25 Standard covers the preparation of butt welding ends of piping components to be joined into a piping system by welding. It includes requirements forwelding bevels, for external and internal shaping of heavy-wall components, and for preparation of internal ends (including dimensions and tolerances). Coverage includes preparation for joints with the following: (a) no backing rings (b) split or noncontinuous backing rings (c) solid or continuous backing rings (d) consumable insert rings (e) gas tungsten arc welding (GTAW) of the root pass Details of preparation for any backing ring must be specified when ordering the component. ANSI/ASME B16.25 Standard applies to any metallic materials for which a welding procedure can be satisfactorily qualified, but does not prescribe specific welding processes or procedures. Unless otherwise specified by the purchaser, it does not apply towelding ends conforming to ASME B16.5, B16.9, or B16.47.

The American National Standard Institute, ANSI, has been overseeing guidelines and standards for products manufactured through several sectors. WHAT IS ANSI? ANSI-approved flanges are used for the industrial market which handles gas, air and steam process systems. Originally formed in 1918, the American National Standards Institute is headquartered in Washington, DC, and is widely recognized as the American organization responsible for overseeing the national standards and conformity assessment system for products, services, processes, systems, and personnel. ANSI works domestically with American government agencies and organizations, as well as with international entities, to make ANSI standards useful around the world. Prior to the creation of ANSI, standards for engineering and equipment such as flanges were developed by the American Institute of Electrical Engineers (AIEE or IEEE), the American Society of Mechanical Engineers (ASME), the American Institute of Mi...

The Lap joint stub end is the fittings that are used in place of welded flanges when the support of rotating back up flanges is required. Lap Joints also named stub Ends and vanstone flared laps, it is used in place of welded flanges where rotating back up flanges are desired. Minimum lap thickness shall not be less than nominal wall thickness. Contact faces of stub ends shall have a concentric serration or spiral according to the purchaser's requirements. These lengths and radius apply for schedule 40s or thinner stainless steel pipes. Radius of fillet B is only effective to MSS SP-43 lap joint stub ends. Lap Joints are consisted of three series. Nominal Pipe Size Outside Diameter at Bevel Length Radius of Fillet Diameter of Lap A B NPS D L R G 1/...

Carbon Steel Stub Ends are manufactured from A106 grade B seamless pipe with Ring and Barrel Construction, per ANSI B16.9 dimensions. The ASTM Fittings Specification is WPB W, welded with no Radiograph of the weld, and they are available in sizes 2″ thru 24″ and in standard and heavy wall thickness. Seamless stub ends are manufactured from A519/A106 hot rolled seamless to meet ASTM Fitting Specification A234WPB. ASA-A (Long Pattern) stub ends are available in size 1/2″ thru 4″ and in all wall thicknesses.  Material:  Carbon Steel ASME / ASTM SA / A234 WPB, DIN 1.0405 Dimension:  ANSI B16.9, ANSI B16.28, JIS B2312, JIS B2313 Thickness:  Schedule 5S, 10S, 20S, S10, S20, S30, STD, 40S, S40, S60, XS, 80S, S80, S100, S120, S140, S160, XXS and etc. Size:  1/2″-80″ Minimum lap thickness shall not be less than nominal wall thickness. Contact faces of stub ends shall have a concentric serration or spiral according to the purchaser's requirements. The...