What is water standards for hydrostatic testing?

Selection and Treatment of Water and Conduct of the Test, to Maintain the integrity of the System is a priority concern in new-building or construction project. Specially on Stainless-steel which is very sensitive to corrosion. 1.0 Introduction Welded fabrications are frequently tested hydrotested for pressure tightness. Unless properly conducted, this procedure can induce problems. It is important to avoid initiating corrosion of the fabrication by subjecting it to critical conditions outside the initial design constraints. Where the vessel is to handle materials which are later ingested, contamination must be avoided. Damage may be caused by the induction of latent corrosion … Continue reading What is water standards for hydrostatic testing?

Mechanical maintenance (Rotating/Static equipment’s) PDF for day to day mechanical maintenance job and for interview purpose .

Greetings to all, This PDF (Mechanical maintenance-Rotating/Static equipment’s)ready for day to day mechanical maintenance job and for interview purpose (refer many books and taken photos/drawings), if you found its worth than its my humble request  to give food to at … Continue reading Mechanical maintenance (Rotating/Static equipment’s) PDF for day to day mechanical maintenance job and for interview purpose .

What is Hot Induction Bends and Inspection guides.

This article outlines the minimum requirements for manufacturing of induction pipe bending according to ASME B31.8, ASME 16.49 and ISO 15590-1. Induction Bending is formed by passing pipe through an induction bending machine. This machine uses an induction coil to heat a narrow band of the pipe material. As the pipe is pushed through the machine, a bend with the desired radius of curvature is produced. The heated material just beyond the induction coil is quenched with a water spray on the outside surface of the pipe. Thermal expansion of the narrowly heated section of pipe is restrained due to … Continue reading What is Hot Induction Bends and Inspection guides.

Certification of Line-pipe for oil and gas service

This article will guide you about the general specification for steel line pipe and pipeline from the requirements for manufacturing, testing, inspecting, marking, and shipping of steel line pipe for gas and liquid pipelines for offshore applications at purchasing stage or vendor document review process. The following documents are considered part of this specification. Use the edition of each referenced document in effect on the date of the publication of this specification. API SPEC 5L Specification of Line Pipe API RP 5L1 Recommended Practice for Railroad Transportation of Line Pipe API RP 5LW Recommended Practice for Transportation of Line Pipe … Continue reading Certification of Line-pipe for oil and gas service

What is Galvanic corrosion between two different materials?

Ever wanted to know more about the Galvanic Series? Read on to find out about what it is and how to use it to analyze the compatibility of joining (fastening) metals. In this article, we’ll look at an example to illustrate the use of the galvanic table. You can also learn more about overcoming potentially compatibility issues between metals. What exactly is the Galvanic Series? The Galvanic Series, also called the electro-potential series, lists metals in the order of their nobility. (Noble metals are those that are resistant to corrosion and oxidation.) When two metals are immersed in an electrolyte, … Continue reading What is Galvanic corrosion between two different materials?

What is Blow Down Valve and Sizing BDV?

At upstream process (PLEM, SSIV, SSCV) to Riser, in case of emergency shutdown (ESD) or depressurizing (process shutdown – PSD), the BDV valve automatically/remotely opens to release high pressure fluid flow to flare system. The following are guidance for developing the BDV (Blowdown Valve) to flare system: BDV Sizing and Its Line Sizing to Flare-system The BDV size is same with the inlet and outlet line size. How to determine the appropriate line size? You must determine the maximum flowrate through this BDV line during depressurizing. Hence, you have to conduct depressurizing study-workshop at first. Based on the maximum flow … Continue reading What is Blow Down Valve and Sizing BDV?