Joston DN159/DN219/DN250 Stainless Steel 304 High Pressure Vessel Manhole Covers

• Product Name: Pressure Manhole
• Material: Stainless Steel
• Application: Industry
• Usage: Industrial Chemical
• Packing: Carton Box
• Weight: 5.3kg/5.8kg/7.5kg
• Model NO.: MH
• Technics: Mirror Polishing
• Surface Treatment: Mirror
• Advantage: High-Quality
• Transport Package: Wooden Case Packaging/According to Customer
• Specification: 5L -10000L
• Trademark: JOSTON
• Origin: Wenzhou, China
• HS Code: 73090000
• Production Capacity: 30 Sets/Month

Product Description

Manholes have been shaped products, usually 600mm in diameter. The center of the manhole is generally 750mm from the floor. It is convenient for the staff to enter and exit the oil tank or ventilate during installation, cleaning and maintenance.
The manhole of the non-metal oil tank is arranged on the top of the tank, and the manhole of the metal oil tank is arranged on the bottom plate of the tank wall. Most of them are round holes with a diameter of 600mm, with a center distance of 750mm from the bottom plate, which is used by oil tank cleaning or maintenance personnel to enter and exit the oil tank. It is also called a door. Use manholes for lighting and ventilation at all times during maintenance and cleaning of oil tanks. Vertical oil tanks have 1 to 2 manholes when the capacity is below 5000m3, and 2 manholes for those above 5000m3. The installation of the manhole should be no more than 90° away from the oil inlet and outlet pipelines. When only one manhole is provided, it should be placed on the opposite side of the light-transmitting hole on the top of the tank; when two manholes are provided, one of them is located on the opposite side of the light-transmitting hole, and the other should be separated from the first manhole by at least 90 °.

One manhole should be located near the right side of the oil inlet and outlet pipes, and try to make the manhole face the closed door of the tank chamber so as to facilitate the entry and exit of the oil tank, the maintenance of the oil tank and the ventilation pipe.
Since the manhole is installed on the bottom ring of the oil tank, leakage prevention is particularly important. It is required that the joint surface of the two flanges must be flat and free of twisting. Reinforcing plates and flanges should be cut on the whole steel plate as far as possible without splicing. The flange and cover plate are processed with sealing rings, so special attention should be paid to protection during construction. 3mm thick asbestos rubber gasket is used for sealing, no cracks are allowed. When installing the manhole cover to tighten the bolts, force evenly at diagonal angles to prevent the manhole cover from deforming.

Divide

1. Divided by the capacity of the communication tube block
According to the manhole, the specification is 360mm wide and 250mm high (in the standard six-hole pipe hole
Stainless steel manhole
Cement pipe blocks with a diameter of 90mm, referred to as standard blocks) pipe section pipe blocks or single-hole pipe pipe holes with an inner diameter of 90mm, are divided into three categories: large, medium and small.
The size of the manhole installed in the communication pipeline shall be set according to the long-term capacity of the communication pipeline. We should not only consider the capacity of communication pipelines in the current period.

2. Divided by the direction of the manhole
Manholes can be divided into straight-through manholes, three-way manholes, four-way manholes and oblique-through manholes according to the direction of manholes. For details, see Table 1 below. Among them, the oblique manhole is divided into five types: 15°, 30°, 45°, 60°, and 75°. The angle of each oblique manhole can be applied within the range of ±7.5°.

3. Divided by the load bearing capacity of the manhole overlying
According to the load bearing capacity of the manhole overlying, it can be divided into two types: steam-20 grade and steam-10 grade.

SERVICE

We have established some overseas agent office to make the after-sales serivce already ,so it can will be service client in fast response .also in our headquarter service team ,there is a expert team which can support client in 7*24 hours .
1. Customer inquiry and consultation (URS documents)
2. Confirmation of treatment plan (DQ documents &PID Drawing)
3.Quotation offer with the technolgy document (Quotation PI )
4.Engineering and Manufacturing (Prodcution &Quality inspection )
5. Product inspection (FAT documents)
6. Delivery arrangement and loading work (full set Shipment documents)
7. After-sales service (OQ,PQ ,SAT documents)


FAQ

1.What about your factory?
Our factory is located in Wenzhou city ,Zhejiang Province and have more than 15 years experience on machinery making.

2.How will your company  control the equipment quality ?
We have a qualified expert team ,we will inspect every production proceed .also Machines will be tested in our plant before shipment .

3.How long the warranty will be?
We provide 1 years warranty for the machine running ,but we will afford whole -life service for the machine .

4.Which kind payment do your company do now ?
We accept Western Union, T/T ,D/P,D/C and irrevocable L/C payable etc.

5.Can  we  become  your distributor in our country?
Yes, we very welcome you! More details will be discussed if you are interested in being our agent.

6.Why we choose "JOSTON "?
1. We enhance the reliability of product's quality and working life . 
2. We decrease the consumption cost of the product in the ruuning. 
3. We improve research personnel's ability to deliver a creative design; 
4. We use leading technologies in our product development and innovation, and thereby increase the competitive advantage of products.

7.Do you supply installation equipment in oversea?
Yes, if need, we can  send our  engineer to your plant to help you do installation and commission.

8.How can we know the order production status ?
We will arrange the person to take photo or video during manufacturing in every  week to make you to know the production status.When goods are finished,we will take  detailed photos or video for your checking ,after approve ,then we will arrange shipment .also you can arrange FAT in our plant when the goods is ready here

9.what is kind service do you offer before making order ?
1.according to your company URS ,we will make the design  drawing accoridingly.
2.after your company approved drawing ,we will make quotation.
3. final we make agreement on payment terms ,delivery time ,package ,shipment etc.

10.how about your company after-sale serivce ?
1. We provide long-term after-sale service. 
2. we can do installation and commission for the equipment in your plant if necessary .
3. Meanwhile, you can call or e-mail us to consult on any relevant question since we have a special line for after-sale service. Alternatively, you can communicate on-line with us to solve any problem.