Posted 14 March - 11:52 AM
Hello everyone. I wanted to ask a few questions related to different types of storage tanks used in refinery and nitrogen blanketing.
Part 1: Types of storage tanks
Many websites say that:
1) Fixed roof is for diesel, kerosene, residual fuel oil, etc.
2) External floating roof is for crude oil, gasoline, naptha, etc.
3) Internal floating roof is for aviation fuel, etc.
4) Bullets are for propylene, propane, butane, etc.
5) Underground tanks are for naptha, superior kerosene oil, motor spirit, etc.
On what basis is this decided that a certain product is to be stored in a certain type of tank? Are bullets used for propylene, propane, butane, LPG, etc because large volume of those products are obtained from cracker and they have to be maintained at high pressure because their vapor pressure is also high? Also, my reasoning is that floating roof is probably used for volatile material with high vapor pressure at ambient temperature because of which large volumes could breathe out through the breather valve if they were stored in fixed roof. Is that correct? (Also do we use breather valves in floating roof storage tanks?) And my last question is that on what basis do we decide whether to use internal floating roof or external floating roof?
Part 2: Nitrogen blanketing
I could not understand how nitrogen blanketing actually works (see image attached). Do we push the vapors of the liquid stored out to the atmosphere? Wouldn't that be hazardous? Or do we push the air out of the empty storage tank during startup and then when the liquid is pumped in we take nitrogen out via that control valve that vents to atmosphere? And why is a siphon breaker sometimes provided on vent to atmosphere lines and what exactly is a siphon breaker?
One more small question, why do we ground storage tanks? I know it's to prevent the liquid stored from catching fire if flammable and exploding but where is the static electricity coming from and where does it get accumulated?
Sorry for my beginner level questions and thank you in advance.
Image link: https://cdn1.imggmi....fe-full.png
Edited by traineeprocessengg, 14 March - 12:03 PM.
Drinking Water (Potable Water), Biogas Digester, Sewage Water Tank, Sludge Sedimentation Tank, Borehole Water Tank, Brine GFS Tank, Standard Bolted Enamel Tanks, Fire Water GFS Tanks Factory, Glass Lined Steel Water Tanks Factory, Price for Vitrified Steel Tanks, Glass Fused to Steel Tanks
I.
Glass Fused to Steel Tanks Description and Characteristics
GFS (Glue Fused to Steel) tank is a storage tank assembled from enamel steel plates, stirrups, self-locking bolts, sealant and other accessories on site. It combines the strength of steel and the corrosion resistance of porcelain glaze, and it is been widely used for drinking water engineering, aquaculture sewage engineering, landfill leachate treatment engineering, municipal sewage treatment plant, industrial sewage treatment engineering, kitchen waste treatment engineering, biogas engineering and biomass natural gas engineering. Enamel assembled tank has the advantages of short construction period, strong corrosion resistance, arbitrary expansion and relocation, and its service life is up to 30 years. The surface of the tank is smooth and moist, bright and bright, and the color of the tank can be customized according to the needs of users, especially suitable for the requirements of modern factory construction.
II.
Glass Fused to Steel Tanks Specification
Coating color
dark blue, dark green, white, and customized
A standard steel plate size
effective size mm x m
Steel plates thickness
3mm - 12mm, depends on the diameter & height
Coating thickness
0.25mm - 0.4mm, two coatings internal and external
Acid and alkalinity proof
standard coating suits for PH3 - PH11, special coating suits for PH1 - PH14
Adhesion
3,450N/cm
Elastic
same as steel sheet, around 500KN/mm
Hardness
6.0 Mohs
Service life
>30 years
Spark test
> V
Permeability
gas and liquid impermeable
You will get efficient and thoughtful service from zhaoyang.
Easy yo clean
smooth, glossy, inert, anti-adhesion
Corrosion resistance
excellent! Suitable for wastewater salt water, seawater, high sulfur crude oil, salt fox, organic and inorganic compounds
III.
Glass Fused to Steel Tanks Production Steps
IV.
Glass Fused to Steel Tanks Factory Roof Cover Options
1. Glass-Fused-to-Steel-Roof
· air-tightness,often utilized for pressurized structures and provide a suitable option for odour control
· cone shape roof with external / internal beams
· viable solution for demanding applications
2. Aluminum Alloy Trough Deck Roof
3. Aluminum Geodesic Dome Roof
4. Double Membrane Roof
VI. Glass Fused to Steel Tanks Advantages
Excellent anti-corrosion performance.
Smooth,cohesionless,anti-bacteria.
Wear and scratch resistance High-inertia, high acidity and high alkalinity tolerance..
Fast installation with better quality: design, production and quality control in factory.
Less influenced by local weather.
Safe, skill-free: less working aloft, no need for long timeworker training.
Low maintenance cost and easy to repair.
Possible to combine with other technologies.
Possible to relocate, to expand or to reuse.
Beautiful appearance.
IX.
Glass Fused to Steel Tanks Shipping and Payment:
----------------------------------------------------------------------------------------------------------------------------------------------------------
Hebei Wansheng Environmental Protection Engineering Co., Ltd. with a registered capital of 10 million, covers an area of more than square meters and has more than 200 employees. After years of development and innovation, Hebei Wansheng Environmental Protection Engineering Co., Ltd. is already the first-class GFS bolted tank R & D and production enterprise in the world.
We focus on producing glass fused to steel tanks, on the basis of GFS tanks, we mainly undertake the consulting, designing, construction, commissioning of biogas engineering, drinking water storage projects and wastewater treatment projects ( including municipal sewage, food wastewater, slaughter wastewater, dairy wastewater, dyeing wastewater, medical wastewater, chemical wastewater, beer, paper, pharmaceutical, alcohol, leather wastewater, etc. and the development, processing of environmental protection equipment.
Welcome new and old friends to visit our factory at any time, let us work together to create a better world!
Certificates:
FAQ:
1. Question: What is the thickness of steel plate?
Answer: Normally the thickness is from 3 to 12 mm, our technical and design department will adjust according to your specific requirements, so as to meet your requirements and lower your budget.
2. Question: What is the material quality of your steel plate?
Answer: Our steel plate material is developed by our technicians combined with iron and steel materials experts, especially used in GFS tank production, it has very excellent performance.
3. Question: How many coating layers on the steel plate and how many times are fired in the furnace?
Answer: Our tanks have at least two layers and will be fired in furnace for at least two times, we can also make three layers and three time fired tanks according to customer demand.
4. Question: What is your normal lead time?
Answer: According to the quantity and size of the tanks you need, it usually cost 1 week to one month time.
5. Question: Will you teach and guide us for the installation?
Answer: Certainly. GFS bolted tanks have the characteristics of easy installation. We will instruct you by video or at site according to your concrete projects, and you afford the related cost is ok. Pls rest assured.