4 Inch FIG 1502 Hammer Union Seal in NBR HNBR FKM for Oilfield Flowlines and Union Seal Ring

4 Inch FIG 1502 Hammer Union Seal for Large-Bore Oilfield Flowlines

Royal Way 4-inch FIG 1502 hammer union seals are engineered for large-bore oilfield flowline connections used in pressure-pumping, well-service and production-support equipment. The molded elastomer sealing profile helps maintain connection integrity across repeated make-up and service cycles, while the size-specific configuration gives buyers a clear product reference for maintenance programs, equipment builds and field spare inventories.

Each 4-inch seal can be configured around the union connection, equipment drawing and service conditions. NBR, HNBR and FKM compound families support material selection across varied oilfield media and operating environments, with drawing-led profile production for a closer match to the specified assembly.

Royal Way molded elastomer seals support oilfield flowline maintenance, pressure-pumping equipment builds and project spare programs.

4-inch FIG 1502 seal specifications

Large-bore sealing built around the union assembly

A 4-inch FIG 1502 seal serves a larger connection envelope than the compact union sizes used on smaller lines. Royal Way supports this configuration with clear size identification, profile matching to the equipment reference and coordinated compound selection. Buyers can source the seal for planned maintenance, replacement stock, pressure-pumping packages and new flowline assembly programs, with the selected backup-ring arrangement documented alongside the rubber component.

Material selection for oilfield service

NBR, HNBR and FKM compound families give project teams practical material paths for different service media and temperature requirements. Our rubber team can review the customer service description, specified hardness and drawing callouts to recommend a suitable compound family and molded profile. Keeping size, material and connection reference together helps procurement, maintenance and equipment teams identify the correct 4-inch seal throughout sourcing and replenishment.

Integrated rubber seal production

At the Haimen facility, Jiangsu Ruowei carries out rubber-compound mixing, molding, vulcanization, trimming and inspection for rubber-seal production. The integrated process connects compound preparation with molded profile quality and finished-part review, supporting repeat production for equipment programs and replacement demand. Experienced rubber-manufacturing teams coordinate the process details against the product drawing and order requirements.

Quality checks and project standard alignment

Quality control can include compound cure behavior through MDR, hardness and density checks, video measurement of profile and dimensions, and tensile or elongation testing against the agreed inspection plan. Jiangsu Ruowei's ISO 9001:2015 quality management system covers rubber-seal production. For assemblies designed to applicable API equipment requirements, our team coordinates the referenced standard edition, FIG connection, drawing revision, material callout and inspection documentation with the customer project.

Configure a 4-inch FIG 1502 order

• Union make, equipment model and FIG 1502 connection reference
• 4-inch seal drawing, profile or approved sample
• Service media and operating-temperature requirements
• Preferred NBR, HNBR or FKM compound family and hardness
• Brass or stainless-steel backup-ring arrangement where specified
• Order quantity and requested inspection documentation