EN 81-20/50: NEW LIFT STANDARDS
New European Standards – EN 81-1 EN 81-2 Almost 3 years ago, new European standards for the design, manufacture and testing of lifts were introduced. The standards apply to both passenger lifts and passenger goods lifts and come with the catchy names of EN81-20 and EN81-50. The introduction commenced with a three year transition period which ultimately will see the previous standards EN 81-1 and EN 81-2 phased out completely, by 31st of August 2017. From this date any passenger or passenger goods lift placed into service must comply with the new standards. We are now two thirds of the … Continue reading EN 81-20/50: NEW LIFT STANDARDS
What is the Difference between Code, Standard and Specification?
The difference between Code, Standard and Specification is very important. What is Standard? Follow TWI: Below maybe easy understand: Standard can define as a set of technical definitions and guidelines – or simply a “how to” instructions for designers and manufacturers. It gives all the necessary requirements for the product, service, and operation. A designer will use the standard to design the product, and a manufacturer will use the standard for the manufacturing of the product. Standard serves as a common language for defining quality and establishing safety criteria for the product. ASTM, API, ISO are some examples of the standard. ASTM has more than … Continue reading What is the Difference between Code, Standard and Specification?
Standard discharge connections for Piping ( shore connection flange )
We will summary the standard discharge connection for some piping system on ship, also called by Shore connection flange. The international shore connection is a universal hose connection that is to be provided on all ships as per the IMO SOLAS requirement. The purpose of the International Shore Coupling is to keep a standby hose attachment to get a connection from shore or from other ships for shipboard firefighting, in case there is a total failure of pumps onboard. The information is taken from MARPOL 73/78 1) Sewage system: For example: 2) Fireman system: The international shore coupling SOLAS requirement under Chapter II-2, regulation … Continue reading Standard discharge connections for Piping ( shore connection flange )
Pressure gauge installation requirement!
Regarding to pressure gauge installation, it need to be follow as below: An Isolation valve for maintenance purpose ( can remove without impairing the pressure system’s integrity ) 2. The pressure gauge installed with vertical position is better than horizontal position: + Below pictures is example for wrong installation pressure gauge: 3. To be vented as vendor’s instruction: Document for refer: + WINTERS INSTRUMENTS + WIKA Alexander Wiegand SE & Co. KG Continue reading Pressure gauge installation requirement!
How to take the welding parameters during make WPS / monitor welding performance?
To confirm that a weld has been made to specification: For arc welding the main parameters are as follows: Welding current Arc voltage Travel speed The other parameters which may be measured and recorded are as follows: Wire feed speed (for MIG/MAG) and other processes with a filler wire Gas flow rate (shielding, backing and plasma) Temperature (pre-heat, inter-pass and post-weld heat treatment) Some of these instruments allow the length of the weld to be input so that arc energy (kJ/mm) can be calculated. When measuring voltage and current it is important to do so correctly. + Although current can be … Continue reading How to take the welding parameters during make WPS / monitor welding performance?
FITTING PRESSURE RATING
To be continued from this chapter “Pipe pressure rating“, I’d like to introduce to you about the fitting pressure rating. Note: Flanges, Gaskets, Valves, Weld fittings are designed as CLASS Typically, there’re three type of Fitting CLASS rating: According to ASME B16.5, are made in seven primary Pressure Classes: 150 300 400 600 900 1500 2500 The concept of flange ratings likes clearly. A Class 300 flange can handle more pressure than a Class 150 flange, because a Class 300 flange are constructed with more metal and can withstand more pressure. However, there are a number of factors that can … Continue reading FITTING PRESSURE RATING
ASME B16.5 FLANGE MATERIAL GROUP
ASME B16.5 – List of ASTM Material Specifications MATERIAL GROUP NOMINAL DESIGNATION PRESSURE TEMPERATURE RATING TABLE FORGINGS CASTINGS PLATES 1.1 C-Mn-Si 2-1.1 A350 Gr. LF2 … A516 Gr. 70 C-Mn-Si 2-1.1 … … A537 Cl. 1 C-Mn-Si-V 2-1.1 A350 Gr. LF6 CI. 1 … … 3½ Ni 2-1.1 A350 Gr. LF3 … … 1.2 C-Mn-Si 2-1.2 … A216 Gr. WCC … C-Mn-Si 2-1.2 … A352 Gr. LCC … C-Mn-Si-V 2-1.2 A350 Gr. LF6 Cl. 2 … … 2½Ni 2-1.2 … A352 Gr. LC2 A203 Gr. B 3½Ni 2-1.2 … A352 Gr. LC3 A203 Gr. E 1.3 C-Si 2-1.3 … A352 … Continue reading ASME B16.5 FLANGE MATERIAL GROUP
PIPE PRESSURE RATING
Pressure and temperature ratings take into account function and price to help our customers easily select the most suitable pipe, fittings, valves for their work. The pressure and temperature ratings refer to the relation between the fluid temperature and the maximum pressure each piping component can withstand at that temperature. Products are grouped by material, and each is shown with its rating. Note: Pipe is designed as Thickness and Schedule, there’s no any standard pressure rating for particular pipe but the Calculation guideline. There are two way to select the pipe which can withstand the maximum working pressure of system. Solution … Continue reading PIPE PRESSURE RATING
ISO 15614 Part 1 and ASME IX
The two most frequently encountered to welding procedure specifications are ISO 15614 Part 1 and ASME IX and whilst these are written with the same purpose. There are major differences between the two specifications that mean that they are not equivalent. It will not be possible in this short article to cover every welding variable and its range of approval in the two specifications. Where compliance is required then reference MUST be made to the appropriate specification. With respect to ASME IX the specification requirements can be applied in two ways; ASME intent and ASME stamp. If the welded item … Continue reading ISO 15614 Part 1 and ASME IX
AMARINE 