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Dear all, I am commenting vendors documentation, and there is a modification from the vendor of the steam boiler. In our engineering we consider the boiler burner fuel-oil pumps is outside of the boiler building, but vendor of the steam boiler considers those fuel-oil Pumps inside of the...

Hi, I was asked to review the loads on some supports of a GRP (Glass Reinforced Plastic) pipe, which is gravitational, performing a flexibility analysis. The support arrangement is copied from other projects, whose pipe is geometrically similar with the same service. This pipe feeds a tank of...

Hi, I need to sizes a pump with two different simultaneous impultions (i.e. both different tanks elevations and flow rates in one original discharge ). Unfortunately the company I work for does not have a license for software like fhatom, I can only use excel spreadsheets. Can someone...

Dear all, I have to size a pump wich discharge sodium carbonate (other name is soda ash),design parameters are: T°=122°F, density = 1147 kg/m3, %solid = 0.001 wt%. My doubs is about pipe velocity consideration. For the moment, I'm considering set max pipe velocity at 9.2 fps. I looked for a...

Dear all, I have pipes with category M fluids, hydrochloric acid concentrations of 32% and 5%.This involves flexibility analysis computational calculations. However pipes material is CPVC, so you should not use Caesar II. It is not possible to change the material of pipes because client has...

Dear all, I need your opinion, based on your experience: About selection criteria for steel pipes for flexibility analysis, setting aside both those which are fluid services category M and where indicated by customer, which of following two criteria is correct for computational flexibility...

Hi, I have the following conditions for CPVC (Sch 80) and PVDF (PN16) pipes flexibility stress analysis, using Caesar II (2018): Fluid: HCl (30%), NaOH (5%) Fluid_T°= 70 °C T min/max = -19,1 °C / 25,9 °C Pipes diam: both 6" I am worried about: a) Material properties (allowable stress,elastic...

Dear all, I have to size pumps for both dilute Caustic Soda (5% at 122 °F) and Hypochlorite Acid (32% at 50 °F) fluids. I know there is recommended velocity for each fluids ( e.g. for NaOH velicity is 6 f/sec ) , but there is a max velocity for each fluid to design pipe diameter ? What could...

Hello, I need to model in a suitable program, a continuous filling of gravel that goes over a HDPE pipeline about 2 mile long. I have at least two ideas to do this modeling. 1- Design each node with a simple support and a guide with loose gravel stiffnes, spaced every 7 ft. 2- Modeling as...

Hello, I have to design a soil cover over a 32" HDPE pipeline (1.2 mile). It 's correct to do it continuosly or I have to support it like..I don't know...every 16 ft ? Should I cover elbows also or let them free of cover ? The Fluid of pipe is Brine Temperature: Min = -2 °F, Max = 79 °F...

Hi All, I am looking for the thermal expansion coefficient of HDPE (PE 100) at -2.2°F, to calculate thermal expansión for HDPE Pipeline (PE100). I still can't find a document where to get this data and to calculations back up.

Hi everyone, I'm simulating Pipeline by customer demand of HDPE, diam 32". This HDPE pipeline have few anchor, and most of it's resting on the ground and has only one soil cover. I Attached an image of the soil cover, for better understood...

Dear Friends, For water treatment using Sodium Hypochlorite, Concentration 10% with temperatures between 68 °F - 104 °F, and pipes of 316L 2" SCH40, pressure working ca. 6 barg. This pipes will be ok?, for say 20 year lifetime plant? Regards,

Dear All, I'm working in design of cooling water system wich is using Sodium Hypochlorite in 10% concentration with temperatures between 68 °F - 104 °F. I would like to check if I could use 316L pipes, but couldn't find any corrosion table with Sodium Hypochlorite v/s 316L with the Temperature...

Dear All, I have to change a Tank design (fluid is Biocide) from 3 m3 (792 Gallon) to 0,4 m3 (106 Gallon). My questions: 1.- How to set the relation of a maximum allowable tank diameter and height? 2.- Is there any standard to cover that relation ?. I think API 650 doesn't cover those...

Dear All, I have to design a drain in the bottom of carbón steel tank, but I never done this before so I need guidness in this one. Tank dimension: Int diameter, 47 Ft. & Height 62,3 Ft Fluid: Water with trace of hypochlorite Original design it’s include a 6” nozzle for drain, but our...

Hello, My native language is spanish so, excuse my english. I'm preparing Data Sheet for Polypropylene(PP) Flanges.Our Client have your products of vendor call SIMONA and I have a doubts about their brochure material description. For blind and back-up Flanged theirs description of Material...

Hello All, Our client changed his mind about load class for freight elevator. Inicially we use ASME A17.1S (supplement), section 2.16, paragraph 2.16.2 Minimum Rated load for Freight Elevators. Quote: "Class C3: Other Loading With Heavy Concentrations. Where the static load during loading and...

Hello All, Our client changed his mind and now he wants we follow european standard. The freight elevator we required is C3 load class, so my questions are: What is the equivalent EN standard? What is the EN standard clasification equivalent to C3 load class ? Thanks in advance! Greetings

Dear all, I have to calculate heat exchanger nozzles stiffness. Heat exchanger is plate & frame type. I was looking at internet some handbook, without any results. Can any one give me a hand with this calculation ? Thanks in advance. Best regards.