2-inch FIG602 type 42Mpa high-pressure movable elbow oil field long radius free rotating joint

Description :

  Long radius high-pressure flexible elbow is a connecting component designed specifically for high-pressure fluid transportation systems, mainly used to solve stress concentration problems caused by thermal expansion and contraction, vibration, or installation errors in pipelines under high-pressure conditions. This product is typically used in high-pressure operations such as oil field fracturing, cementing, and drilling, and can withstand working pressures up to 42Mpa. Its core structure adopts a long radius design, effectively reducing fluid resistance and erosion wear. At the same time, it has a 360 degree free rotation function, which facilitates quick on-site docking and angle adjustment, significantly improving construction efficiency and pipeline system safety. It is an indispensable key vulnerable component in petroleum drilling and production equipment.

This high-pressure flexible elbow is strictly manufactured in accordance with API 6A and FIG602 industry standards. The main material is usually high-quality alloy steel (such as 42CrMo), which is forged and subjected to quenching and tempering heat treatment to ensure high strength and toughness. In terms of specifications, the diameter is 2 inches (DN50), the rated working pressure is 42Mpa (approximately 6000psi), and the burst pressure usually reaches more than 2.5 times the working pressure. The sealing structure adopts high-performance rubber O-ring or metal hard seal, combined with precision machined spherical and seat body, to ensure the sealing reliability under high-pressure pulse load. The surface has undergone sandblasting, rust removal, and anti-corrosion treatment to adapt to harsh outdoor working environments. All products leaving the factory have undergone strict hydrostatic testing and non-destructive testing.

When selecting, it is necessary to clearly distinguish the application scenarios of long radius and short radius movable elbows. Long radius high-pressure flexible elbows are more suitable for pipeline connections that are sensitive to fluid erosion or require frequent swinging due to their large bending radius and low flow resistance; Short radii are more commonly used in space constrained situations. In addition, attention should be paid to the differences in size, pressure capacity, and interchangeability between the FIG602 standard and other series such as FIG1002 and FIG1502, and mixing is strictly prohibited. This product is suitable for non corrosive media such as water, mud, oil-water mixtures, etc. If the medium contains strong acids, alkalis, or high-temperature steam, special materials and sealing forms need to be customized. Ordinary carbon steel materials are not suitable for such extreme working conditions.

When installing a long radius high-pressure flexible elbow, it should be ensured that the connecting flange surface is clean and undamaged, and the bolts are evenly tightened diagonally to avoid leakage caused by unilateral force. In daily maintenance, it is necessary to regularly check the flexibility of the rotating parts. If the rotation is found to be stuck, the sediment should be cleaned and lubricating grease should be injected in a timely manner. Focus on monitoring whether there are signs of leakage at the sealing point. Once the O-ring is found to be aging or the body has cracks or severe erosion pits, it must be immediately stopped and replaced. It is recommended to establish a usage ledger to record the cumulative working pressure and duration. Normally, seals are consumables under high-frequency and high-pressure operations, and spare parts need to be reserved according to actual working conditions to ensure the continuity of oilfield operations.

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