KR-H(J) Big Space Clamp Coupling

Brandlanphan KR-H(J)
ColorCustomized
OriginZhengzhou, Henan, China

Product Description

Henan Lanphan KR-H(J) big space clamp coupling is a new type pipe connector, it takes advantage of pressure which produced by medium and self tightening force of sealing ring to seal the medium. KR-H(J) big space clamp coupling is widely applied in coal, thermal power generation, hydro electric generation, petroleum, chemical engineering, food processing, natural gas transportation, sewage treatment, cement pump truck, structural fire protection, shipbuilding, paper making and other industries. Its executive standard is GB/T 8260-2008.

Product Structure
Two shells are connected by bolts on outside, for large caliber clamp coupling, there are three or more shells in head-to-tail connection to form a circle, two connecting pipes are in the center, between them there is special type adhesive tape to seal, the structure of big space flexible clamp coupling makes every pipe connector realize certain expansion amount, and the amount can be adjusted according to specific needs and different model.

Product Function

  1. Realize pipe extension or compression, as well as angular orientation displacement, but it’s not very big.
  2. Comparing to flange, it can enhance work efficiency for 6-8 times, and maintenance workload is very small.
  3. Since big space clamp coupling’s external metal pipe clamp is not close to pipeline tightly, the reasonable gap between pipeline makes pipeline generate certain turn angle.

Product Feature
KR-H(J) big space clamp coupling replaced the pipe connection method with flange plate, and make pipe system in flexible condition, self-compensating. Make pipe flex by temperature difference and pressurize, make pipe bend by base sinking and pipeline move direction. Easy to install and dismount, easy to maintain pipeline and lengthen service life of pipe system.

Sealing Principle
Specific C type rubber sealing ring and unique connection method makes it has triple sealing functions:

  1. rubber sealing ring with self-tightness, withhold pipeline by its elasticity;
  2. tighten bolt on external pipe clamp would further compress the rubber sealing ring;
  3. when there is pressure in pipeline, it will inflict C type lip pressure from inner chamber, and make rubber sealing ring further compress pipe, the higher of the pressure, the better of the sealing property.

Structural Style
KR-H(J) big space clamp coupling has two structural styles: shoulder type and ring type. No matter shoulder type or ring type, they all use welding connection, although it won’t reduce welding process, bolt number greatly lessen comparing to flange connection. It has obvious cost advantage on pressure pipe which over 10kg, steel ring type clamp coupling applies to low pressure pipeline, which is strict to welding location, shoulder type has a wider application range, applies to high, low and medium pressure, while it costs higher.

Comparison of KR-H and KR-J

Both KR-H and KR-J have functions of quick installation, quick knockdown, save cost and replacing expansion joints and flange. But their product structure is different, thus, it’s necessary to know their specific distinguish:

  1. J type clamp coupling applies to high pressure, big turn angle, small compensation amount needs pipe system, reasonable sealing ring design makes it easier to install. While comparing to H type clamp coupling, its compensation amount is smaller, when pipe misplacement or gap inaccuracy, installation easily goes wrong. Thus, it needs excellent professional technical capability installation person.
  2. H type clamp coupling applies to high pressure, small turn angle, big compensation amount needs pipe system, it has advantages of large compensation amount, strong universality. But comparing to J type, its sealing ring design is more complex and not convenient for install.

Specifications

basic specification of PN25 ring type clamp coupling (KRH type)

Nominal
dimension
DN
pipe end external
diameter
D
mm
allowed expansion
amount
Emax
mm
allowed
deflection angle
θmin()
pipe end size
mm
reference dimension
of shape
mm
L d A B C
Ⅰseries Ⅱseries tolerance size tolerance
100 108 ±0.8 6 2.7 20 +1.5
0
8 141 196 80
114.3 6 2.7 20 8 147 202 80
125 133 ±1.0 8 2.3 20 8 166 221 82
139.7 8 2.3 20 8 173 228 82
150 159 8 2.2 20 10 195 260 86
165 8 2.2 20 10 201 266 86
168.3 8 2.2 20 10 204 270 85
200 219.1 219 8 1.9 24 10 257 327 90
250 273 ±1.5 8 1.6 24 10 313 373 92
300 323.9 8 1.6 24 10 366 436 94
325 8 1.4 24 10 367 436 94
350 355.6 ±1.5 8 1.2 24 +2.0
0
10 402 492 106
377 8 1.2 24 10 423 513 106
400 406.4 8 1.1 24 10 452 543 106
426 8 1 24 10 472 562 106
450 457 8 1 30 12 509 614 124
480 8 0.9 30 12 532 637 124
500 508 8 0.9 30 12 560 665 124
530 8 0.8 30 12 582 687 124
550 559 8 0.8 30 12 615 730 126
580 8 0.7 30 12 636 751 126
600 610 8 0.7 30 12 666 781 126
630 8 0.7 30 12 686 801 126

basic specification of PN25 shoulder type clamp coupling (KRJ type)

nominal
dimension
DN
pipe end
external diameter
D
mm
allowed expansion
amount
Emax
mm
allowed deflection
angle
θmin()
pipe end size
mm
reference dimension
of shape
mm
L Dn h A B C
Ⅰseries Ⅱseries tolerance size tolerance size tolerance
200 219.1 219 ±1.0 6 1.5 20.5 ±0.8 232 ±0.8 6.5 274 344 61
250 273 ±1.5 6 1.2 20.5 286 6.5 328 398 61
300 323.9 6 1.0 20.5 337 6.5 383 473 63
325 6 1.0 20.5 338 6.5 384 474 63
350 355.6 6 0.9 24 369 6.7 415 505 70
377 6 0.8 24 390 6.5 436 526 70
400 406.4 6 0.8 25.5 419 6.3 470 560 72
426 6 0.8 25.5 439 6.5 489 579 72

material requirements

No. Name Unit Quantity Material Remark
1 Clamp pc ≥2 pc Nodular cast iron, cast steel, stainless steel, spraying corrosion protection spraying corrosion protection
2 Sealing ring pc 1 NER、NR、EPDM、CR、IIR
3 Short pipe pc 2 Carbon steel, stainless steel
4 Fastener set ≥4 pc 20# galvanization
Note: we can use other material according to client requirements.

Our Service

Pre-Sales Service

  1. According to product’s using condition, technicians will offer rationalization;
  2. Provide detailed product performance specification;
  3. Provide professional quoted price;
  4. Provide 24-hour technical consulting reply.

In-Sales Service

  1. Begin to supervise from raw material, its qualified rate can reach to 100%;
  2. Whole manufacturing process are in strict accordance with promised procedure requirements, product qualified rate can reach to 100%;
  3. Provide product’s inspection record of key junctures to customers;
  4. Provide production schedule photos to customers at regular intervals;
  5. Package and transport products strictly accordance with export standard.

After-Sales Service

  1. Under the premise of correct installation, normal maintenance and using, we guarantee one-year warranty period;
  2. When warranty period has expired, our sold products enjoys lifetime guarantee repair, we only charge cost price for changing product’s standard component and sealing component;
  3. During installation and adjustment period, our after-sale service staff will communicate with customers frequently to know product’s running state in time. Assist customers to install and adjust products until customers are satisfied;
  4. If product has malfunction during operation period, we’ll offer you satisfied answer in time. We’ll reply you within 1 hour and provide solution or send staff to spot within 24 hours after receiving maintenance notification.
  5. Lifelong free technical support. Conduct satisfaction survey and inquiry equipment running condition to clients by telephone or e-mail semiannually from the first day of equipment running, put on records of acquired information.

FAQ

  1. What’s the application area of KR-H(J) big space clamp coupling?
    Henan Lanphan KR-H(J) big space clamp coupling is widely applied in coal, thermal power generation, hydro electric generation, petroleum, chemical engineering, food processing, natural gas transportation, sewage treatment, cement pump truck, structural fire protection, shipbuilding, paper making and other industries.
  2. What’s the applicable temperature of KR-H(J) big space clamp coupling?
    -10℃~80℃.
  3. What’s the applicable pressure of KR-H(J) big space clamp coupling?
    Applicable pressure: 1.0MPa, 1.6MPa, 2.5MPa, 4.0MPa.
  4. What payment terms do you accept?
    T / T, Paypal, Western Union, Ali credit insurance, L/C etc. Other payment terms can be discussed during transaction.
  5. How to delivery the product?
    According to the quantity. It is always by Express, by sea, by air.

Packaging & Shipping

KR-H(J) big space clamp coupling usually use non-fumigation wooden case to package, for large diameter and large amount orders, metal frame package is customizable.

Advantages

  1. Comparing to traditional flange plate, KR-H(J) big space clamp coupling has advantages of reasonable design, good technical performance, reliable and safe operation and high social benefit.
  2. Small in volume, light weight, structure is simple, long service life.
  3. Low project cost. It enables compensate steel pipe expansion by itself, whole pipe can operate without expansion compensator.
  4. Good sealing property. The higher of medium pressure, the better of sealing property, and it’s impact resistance and shack resistance.
  5. Wide application range. Electric power, mining, chemical engineering, environmental protection.
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