What is post delivery work ?

KHAN has been provide post delivery work on offshore plant and you will know the process of post delivery work from this post. Furthermore, KHAN has been providing multi-discipline package installation and manufacturing of Onboard items Equipments & System to be installed by Owner/Client – 3rd Party equipments – Installation equipment / system itself – Work for interfacing with existing facilities (Electrical signal, Power, Air line, Water line, Etc.) Modification / Upgrade of existing systems by Owner – Structure – Piping Line – System & Equipment Carryover Work & Punch Work handed over from Shipyard to Owner The process of post delivery work. If you want to know about KHAN, then you will visit to their website (http://www.khan-offshore.com). [cq_vc_modal buttontext=”JTNDYiUzR...

What is SaVo System ?

Safety & Voice System (SaVo Systme) is an Automatic Emergency Call System at unconscious state & Easy Communication System.

Minimum Required Documentation for Supplying Materials

Building plant requires a lot of paper works such as QCP, ITP, Manufacturing Procedure, Sub-vendor list, Mechanical Book, Installation Manual, Quality Assurance Record, MTC and so on. Due to the reason, some suppliers are having difficulties especially for start new companies. Each document has specific purpose of use, for example ITP(Inspection Test Plan) is to check inspection plan how, what and when we check during inspection. All documents must be submitted on each stage of production and confirmed by end user in advance. If we do not submit the documents on time, it could impact production lead time. Then you will face a big problem like delay or penalty. So, I hope this would be a small help to understand what kind documents we must prepare for participate in plant projects. Material...

Titanium Tube Crack

The crack on the titanium tubes which is the surface of condenser, was found during the commissioning. There are a few causes of tube damage which may occur by one or more combined mechanisms during operation as below. Erosion at steam side Damage by impact Condensate corrosion Stress corrosion cracking at steam side Fretting and fretting corrosion from tube vibration Tube impact damage from tube vibration Fatigue and corrosion fatigue from tube vibration

Corrosion, and Painting Failure

The purpose of painting is to prevent corrosion from moisture, acid gas, or other factors. So, we apply varnish coating, galvanizing, or anti-corrosion coating for steel products. However, applying any kind of painting doesn’t guarantee anti-corrosion. On CS structure of CT equipment, we found progressing corrosion. The facilities are installed in the seawater and every steel structure is exposed to it. The design was to use Seawater Protection paint but supplier applied general type of paint. Eventually, seawater permeates into the steel and made corrosion.   Hear is an example how coating is important and seawater is capable of making corrosion. ‘Z’ company in Germany carried out corrosion tests on their own products, Alkyd resin and Waterborne acrylic emulsion. Th...

Pitting on the Surface of HIC(Hydrogen Induced Crack) Plates

Pitting or Pitting Corrosion is well known quality failure which we can find on the surface of steel products. Every steel products have stabilized surface which doesn’t response to oxygen or other acidic gas. Harden surface made by heat treatment protects products from those gases. By some reason, however, if surface got damaged, scratch, pock etc the area exposed to O2, H2O, H, then ion responses to those factors and the surface starts to corrode products. Beginning stage, we can’t see any serious damage but scratch. Once it starts to corrode, it’s very fast and losing mass to the direction of gravity. And then it makes hole. More serious problem for HIC (Hydrogen Induced Crack) plates is because its environment of use. In sour service, there is much more acid gas which...

Cause of Rust on the Surface Painted

Steel products easily get rusted unless it’s stainless steel. There is many efforts to prevent rusting for example painting, varnishing, or rust transforming for the rust already have. Most of all, it would be better not to have the products rusted. However, sometimes we can find wave mark rust on surface after we applied anti-rust materials. It’s normally caused by moisture in the materials. In case of accidental water drop in paint and then we use it for the products, we can’t know until the rust happens but we can find the wave mark rust when it’s dried. Also, steel product itself includes moisture. We can’t see this kind of rust from hot-finished pipes because they are varnished right after hot-finish process. But pressure vessels are always exposed weathe...

LNG FPSO MPDS (Multi-Purpose Dynamic Simulator) PROJECT (4) – Fractionation Unit & Fuel Gas Unit

The Fractionation Unit (F-5000) is to process the heavy hydrocarbons separated from the sweat and dry feed gas in the scrubber column (L-C-4001) of the liquefaction unit (L-4000). The fractionation unit consists of three (3) distillation columns in series, Deethanizer (F-C-5001), Depropanizer (F-C-5002) and Debutanizer

LNG FPSO MPDS (Multi-Purpose Dynamic Simulator) PROJECT (3) – Liquefaction Unit

Offshore liquefaction facilities have different design criteria and process requirement from the on-shore liquefaction facilities. Thermodynamic efficiency is the most important factor for the large scale LNG production plant in both on-shore and offshore processes, but the offshore liquefaction facilities have different design requirements ....

LNG FPSO MPDS (Multi-Purpose Dynamic Simulator) PROJECT (2) – Dehydration Unit & Mercury Removal Unit

The Dehydration Unit (D-2000) is to remove water from the natural gas feed prior to the pre-cooling of the gas. Three fixed molecular sieve beds operating in parallel are used in the process. At any given time two of the beds are in the adsorption cycle while the other bed is in the regeneration cycle.

LNG FPSO MPDS (Multi-Purpose Dynamic Simulator) PROJECT (1) – General & Acid Gas Removal Unit

The process is designed for the MPDS (Multi-Purpose Dynamic Simulator) development of the LNG (Liquefied Natural Gas) FPSO (Floating Production Storage and Offloading) topside process. The design concept, engineering data and information included in this document and “Basic and Engineering Design Package ....

Pressure Vessel Hydro Test Failure

Hydro test is mandatory for pressure vessels and we see often test failure in many cases. This time we found the failure during the test due to heavy load and weak ground holding the equipment. At the stage of start, everything was fine however, the ground holding the equipment wasn’t solid enough and the ground finally collapsed. The weight of the pressure vessel including water was appx. 800 ton. But design engineer didn’t include the weight of water at design stage. For an information, the necessary period of cement hardening is minimum 28 days. Normally after 3 days, people can work on the ground however inside of the structure is still including moisture. If something heavy is used on the ground before 28 days, cracks could be found. It wasn’t checked whether the tes...

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