Sell hdpe fittings @India

TECHNICAL NOTE of HDPE Pipes & Fittings

About HDPE

The plastic industry today is the bedrock of modern industrial civilization. One of the most dynamic and high potential industrial sectors, it has lately come to acquire more dimensions than it was ever expected. Having invaded practically every sector from Agriculture to Aviation, Transportation to Telecommunication and from Consumer Durables to Construction, plastic has become an integral part of our daily life, so much so that we are literally living in a plastic age, plastic pipes being part of this revolution.

In the earlier days, the commonly used piping material was M.S., R.C.C., Cement, etc. As the time advanced, these materials proved to be costly in handling, installation and maintenance. This led to the discovery of pipes/ fittings made from plastic materials.

In the sphere of piping engineering, the advent of pipes made of plastic material is acknowledged internationally as the latest, most economical and reliable way of fluid and gas transportation, ducting for Optical Fibre Cables in Telecom sector and other cable ducting.

Since plastic was accepted as the most suited Piping & Ducting material, the Engineers and Technologists kept on their efforts to develop more and more reliable plastic material which ultimately led to the discovery of High Density Poly-Ethylene (HDPE) as the best suited plastic material. Today, HDPE is very popularly used and recommended by Field Engineers and Consultants due to its strength, high flow efficiency, low cost of operation and maintenance, longevity and a host of other unique salient features.

Thanks to HDPE, a revolutionery thermoplastic, all the shortcomings of pipes as a medium for the flow of fluids, ducting for optical fibre and other cables etc have now been overcome. "Anjney" pipes & fittings are manufactured by Anjney Tubes India., a company that started with a humble beginning two decades ago. Today, it is catering to the needs of various segments of our society and industry, viz; Water Supply & Drainage, Chemical & Pharma, Agriculture & Irrigation and a host of other applications.

PRODUCT RANGE – INDUSTRIAL PIPING

Ø H.D.P.E. PIPE : “ANJNEY” brand HDPE Pipe ISI 4984/1995

(a). PE63: 20 mm to 315 mm & PN-2.5 to PN-12.5

(b). PE80: 20 mm to 315 mm & PN-2.5 to PN-16

(c). PE100: 20 mm to 315 mm & PN-4 to PN-16

Ø H.D.P.E. PIPE FITTINGS:“ANJNEY” brand as per IS8008/1976 & 2003

(Refer our Drawing for Match your application)

(a). Flange Slippon: 20 mm to 400 mm OD

(b). Long neck pipe end: 20 mm to 630 mm OD

(c). Short neck pipe end: 20 mm to 630 mm OD

(d). Flange Blind: 20 mm To 400 mm OD

(e). End Cap: 20 mm to 315 mm

(f). Reducer: up to 560 mm with every reliable connection.

Welding Method

PE pipe or fittings are joined to each other by heat fusion or with mechanical fittings. PE pipe may be joined to other pipe materials by means of compression fittings, flanges, or other qualified types of manufactured transition fittings. There are many types and styles of fittings available from which the user may choose. Each offers its particular advantages and limitations for each joining situation the user may encounter. Contact with the various manufacturers is advisable for guidance in proper applications and styles available for joining as described in this document.

There are three Fusion heat fusion joints currently used in the industry; Butt, Saddle, and Socket Fusion. Additionally, there are two methods for producing the socket and The most widely used method for joining individual lengths of PE saddle heat fusion joints. pipe and pipe to PE fittings is by heat fusion of the pipe butt ends as illustrated in Figure 1. This One method, used for all three types of joints, uses special heating tools for heating the technique produces a permanent, economical and flow-efficient connection. Quality parts to be joined. The other method, “electrofusion”, is used only for socket and saddle-type joints. Heat is generated by inducing using trained into a conductor that butt fusion joints are produced by electric current operators and quality butt fusion is a part of the electrofusion fitting machines in good condition.

The principle of heat fusion is to heat two surfaces to a designated temperature, then fuse them together fusion machine should be capable of The butt by application of a sufficient force. This force causes the melted materials to flow and mix, thereby resulting in fusion. When fused according to the pipe and/or fitting manufacturers' procedures, the joint area becomes as strong as or stronger than the pipe itself in both tensile and pressure properties. As soon as the joint cools to near ambient temperature, it is ready for handling. The following sections of this chapter provide a general procedural guideline for each of these heat fusion methods.

The most widely used method for joining individual lengths of polyethylene pipe is by heat fusion of the pipe butt ends as illustrated in Figure 1. This technique, produces a permanent, economical and flow-efficient connection. Quality butt fusion joints are produced by using trained operators and quality butt fusion machines in good condition.

• Aligning the pipe ends

• Clamping the pipes

• Facing the pipe ends parallel and square to the centerline

• Heating the pipe ends

• Applying the proper fusion force

Figure 1 - A Standard Butt Fusion Joint

The six steps involved in making a butt fused joint are:

1. Clean, clamp and align the pipe ends to be joined

2. Face the pipe ends to establish clean, parallel surfaces, perpendicular to the center line

3. Align the pipe ends

4. Melt the pipe interfaces

5. Join the two pipe ends together by applying the proper fusion force

6. Hold under pressure until the joint is cool

Butt Fusion of PE Pipe Products with Different Wall Thicknesses

PE pipes of the same outside diameter but having different specified wall thicknesses, that is, different DR designations, may be butt fused to each other under special conditions. Since this represents a special situation, it is subject to limitations. Therefore, the user is advised to consult with the pipe manufacturer to determine if the special procedures can be applied to the pipe components involved in the particular installation in question. If so, a written copy of the applicable assembly recommendations should be obtained.

Optional Bead Removal

In some pipe systems, engineers may elect to remove the inner or outer bead of the joint. External, or both beads are removed with run-around planning tools, which are forced into the bead, then drawn around the pipe. Power planers may also be used, but care must be taken not to cut into the pipe’s outside surface.

It is uncommon to remove internal beads, as they have little or no effect on flow, and removal is time- consuming. Internal beads may be removed from pipes after each fusion with a cutter fitted to a long pole. Since the fusion must be completely cooled before bead removal, assembly time is increased slightly.

Saddle/Conventional Fusion

The conventional technique to join a saddle to the side of a pipe, illustrated in Figure 2, consists of simultaneously heating both the external surface of the pipe and the matching surface of the “saddle” type fitting with concave and convex shaped heating tools until both surfaces reach proper fusion temperature. This may be accomplished by using a saddle fusion machine that has been designed for this purpose.

Figure 2 - Standard Saddle Fusion Joint

Saddle fusion using a properly designed machine, provides the operator better alignment and force control, which is very important to fusion joint quality. The Plastics Pipe Institute recommends that saddle fusion joints be made only with a mechanical assist tool unless hand fusion is expressly allowed by the pipe and/or fitting manufacturer.

There are eight basic sequential steps that are normally used to create a saddle fusion joint:

1. Clean the pipe surface area where the saddle fitting is to be located

2. Install the appropriate size heater saddle adapters

3. Install the saddle fusion machine on the pipe

4. Prepare the surfaces of the pipe and fitting in accordance with the recommended procedures

5. Align the parts

6. Heat both the pipe and the saddle fitting

7. Press and hold the parts together

8. Cool the joint and remove the fusion machine

Most pipe manufacturers have detailed parameters and procedures to follow. The majority of them helped develop and have approved the PPI Technical Report TR-41 for the generic saddle fusion joining procedure for PE pipe and ASTM 2620.

This technique consists of simultaneously heating both the external surface of the pipe end and the internal surface of the socket fitting until the material reaches the recommended fusion temperature, inspecting the melt pattern, inserting the pipe end into the socket, and holding it in place until the joint cools. Figure 4 illustrates a typical socket fusion joint. Mechanical equipment is available to hold both the pipe and the fitting and should be used for sizes larger than 2” CTS to help attain the increased force required and to assist in alignment. Most pipe manufacturers have detailed written procedures to follow.

Figure 3 – Standard Socket Fusion Joint

Follow these general steps when performing socket fusion:

1. Thoroughly clean the end of the pipe and the matching inside surface of the fitting

2. Square and prepare the pipe end

3. Heat the parts

4. Join the parts

5. Allow to cool

Electrofusion (EF)

This technique of heat fusion joining is somewhat different from the conventional fusion joining thus far described. The main difference between conventional heat fusion and electrofusion is the method by which the heat is applied. In conventional heat fusion joining, a heating tool is used to heat the pipe and fitting surfaces. The electrofusion joint is heated internally, either by a conductor at the interface of the joint or, as in one design, by a conductive polymer. Heat is created as an electric current is applied to the conductive material in the fitting. Figure 5 illustrates a typical electrofusion joint. PE pipe to pipe connections made using the electrofusion

process require the use of electrofusion couplings.