Field-tested articles, free engineering calculators and interview preparation for piping, mechanical and process engineers working in oil & gas, power, cement, fertilizer and petrochemical plants — written by practising engineers and referenced to ASME, ASTM, API and TEMA codes.
The Aienginear Engineering Blog is a free knowledge hub for industrial engineers. It explains piping design, pipe materials, fittings, heat exchangers, plant turnarounds and engineering calculations in plain language, with code references (ASME B31.3, ASME B36.10M, ASME B16.9, ASME Section VIII, API 520/521, TEMA and ASTM) and worked tools you can use on real projects.
Pipe basics, dimensions, schedules, specifications and inspection.
Material selection for process piping and key ASTM specifications.
Fitting types, dimensions and how pipe and fittings are made.
Static equipment and shutdown planning from real project experience.
Browser-based tools for sizing, pressure and flow checks.
Prepare for piping and mechanical engineering interviews.
Articles are written and reviewed by Muhammad Raza, a practising project engineer who leads mechanical, piping and refurbishment works for power, cement, fertilizer and oil & gas plants. Each guide is checked against the relevant ASME, ASTM, API or TEMA standard before publishing.
The blog covers ASME B31.3 process piping, ASME B36.10M pipe dimensions, ASME B16 fittings and flanges, ASME Section VIII pressure vessels, API 520 and 521 pressure relief, TEMA heat exchangers and ASTM material specifications such as A53 and A105.
Yes. All Aienginear calculators are free to use in your browser with no sign-up. They are intended for preliminary sizing and learning; final designs should always be verified by a qualified engineer against the governing code.
Start with the 50 Piping Interview Questions and Answers article, then work through the topic-wise sets on piping codes, materials, fittings and gaskets. Review pipe schedules and material grades, and practise explaining real examples from site or design work.
New guides, calculators and interview question sets are added regularly, and existing articles are updated when codes are revised. Check this page or the Calculators menu for the latest additions.
Editorial standards: Aienginear content is original, referenced to current editions of the applicable codes, and reviewed for technical accuracy. It is for education and preliminary engineering only and does not replace project specifications or the judgement of a qualified engineer. Questions or corrections? Contact us.
Latest Blog Articles
50 piping interview questions and answers for 2026 by Aienginear — NPS and schedules, ASTM materials, fittings, ASME B16.5 flanges, B31.3 hydrotest and pneumatic testing, and pipe stress analysis, with printable tables, a self-test quiz and a free PDF.
How pipe fittings are manufactured: hot mandrel and cold-formed elbows, hydraulic bulge and hot extrusion tees, reducers, caps and stub ends, with ASME B16.9-2024 and ASTM A234/A403 heat treatment and testing rules.
Heat exchangers explained by a turnaround engineer: how they work, every major type, TEMA AES/BEM/BEU designations, a worked LMTD sizing example, typical U and fouling values, current codes (TEMA 11th ed., ASME VIII, API 660/661/662), materials, damage mechanisms, tube NDT and a step-by-step maintenance procedure with printable tables and calculators.
Long activities and critical path in turnaround scheduling explained: total, free, zero and negative float, a worked CPM forward/backward pass, how discovery work shifts the critical path, DCMA/AACE schedule checks, Primavera P6 longest path, PERT risk and crashing vs fast-tracking.
Plant turnaround and shutdown management guide: T-minus milestones, scope freeze, job packs, critical path, positive isolation, gas testing, ASME PCC-1 bolting, PSSR startup, KPIs, calculators and printable Aienginear checklists.
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