Introduction: JIS F7319 identifies the globe valve standard, and 10K identifies its pressure class, while the piping drawing decides whether a specific marine cast steel globe valve fits the line.
The piping drawing then decides whether a specific valve fits the line. When a shipyard piping engineer hands a line list to procurement, the real question is not which globe valve is best in general. It is whether a JIS F7319 10K marine cast steel globe valve fits one specific pipe run without rework, and whether the documentation matches what the drawing calls for. Procurement staff sit in the middle of that conversation. They need enough technical vocabulary to question a supplier and enough drawing detail to get an accurate quote the first time. The practical order is standard number, pressure class, body material, flange connection, and the drawing details a marine globe valve manufacturer needs before quoting.
JIS F7319 is the Japanese Industrial Standard covering cast steel globe valves for marine service. It identifies a defined family of valves sized and built for shipboard piping, which is why the designation appears on Japanese-built vessels, on newbuildings with Japanese piping packages, and on repair work where an existing valve must be replaced with a unit that still matches the line. The 10K attached to it is the pressure class in the Japanese nominal pressure system, roughly 1 MPa of nominal working pressure at the reference temperature. For a globe valve, the designation also points to a valve family used where flow needs to be trimmed rather than simply opened and closed, because a globe valve throttles smoothly and can hold a partial opening in service.
A 10K stamp is the starting point; allowable working pressure falls as temperature rises. That is why 10K at ambient temperature and 10K in a saturated steam header are two different engineering conversations. International rating practice such as ASME B16.34 handles the same principle through pressure-temperature tables, and that framework helps explain why suppliers ask for design temperature when you only want to discuss class. This valve is built for steam, oil and gas service, and those media rarely share the same temperature envelope. A low-temperature fuel oil line and a hot steam header can have the same bore and the same 10K class while still needing trim details confirmed against the drawing. Give the supplier the design pressure and design temperature together with the class, and the reply becomes a technical answer for your line.
Flange fit causes most installation surprises. JIS 10K flanges have their own outside diameter, bolt circle, bolt count and facing geometry, and they use a different bolt pattern from ANSI class 150 flanges of the same nominal size. Two valves can both be described loosely as six-inch, low-pressure, and still fail to bolt together on the deck plate. The piping drawing therefore has to state the flange standard, nominal size, pressure class and facing type, and the valve has to be drilled to match that combination. On a newbuild, this is usually captured in the piping specification, so the order moves smoothly. On repair and replacement work, it is often the detail that returns a valve to the workshop because the replaced unit was ordered against a description rather than the flange face. The bolt-hole pattern is the easiest item to verify early, since it only needs the drawing and supplier confirmation.
Cast steel is the body material this JIS F7319 valve family calls for, and it is what allows the valve to serve engine room lines. The body must suit steam, fuel oil and gas service, and the flanged connection must hold its position in a working pipe run. The throttling behaviour matters just as much: a globe valve forces the medium through a seat opening that changes with stem travel, giving the operator fine flow control instead of all-or-nothing shutoff. That is why this design appears in fuel oil and steam regulating positions. The bonnet choice is a real decision: this valve is available with a bolted bonnet and with a welded bonnet. The choice affects the joint arrangement at the bonnet and should be settled with the piping engineer before the enquiry goes out. Bore size, face-to-face dimension and trim material for a specific line are confirmed against the drawing rather than assumed from a class number.
Picture the usual shipyard sequence. The piping engineer finishes a line list, procurement collects the valve data, and the same enquiry goes to several suppliers at once. The reply that is technically correct on the first pass usually comes from the enquiry that carried enough detail. When globe valve manufacturers receive a shipyard package, the quality of the reply depends on how well the drawing data travels with the request. A supplier who reads the drawing carefully will ask about the flange facing, flag a missing face-to-face dimension, and identify which trim details need confirmation. A vague description invites a generic quote and leaves installation problems to be discovered later. The information that makes a quote usable is practical. Start with the line number and service so the medium is unambiguous, then the nominal bore and pressure class, then the flange standard and facing type. Face-to-face length belongs in the enquiry because it decides whether the valve body physically fits the gap left in the pipe run, and it is one of the items that must come off the drawing rather than from a general table. Add body and trim material, design pressure and design temperature, the bonnet preference, the quantity, and whether the project needs classification certificates. If certificates are required, raise that at enquiry stage because availability is worth checking through drawing review and technical discussion. A short data sheet carrying those items turns into a clean technical reply and gives you a clear basis for technical review. If two suppliers answer the same drawing differently, the disagreement itself is useful because it usually points to a detail in the line list that deserves a second look before anything is ordered.
Read the valve against the drawing, and the four pieces fall into place. The standard number tells you which valve family you are dealing with, 10K tells you the pressure class, cast steel tells you the body material, and the JIS flange tells you whether the valve will bolt to the line. The drawing ties all four together and decides the bore, face-to-face length and trim for that specific position. If you are working through a shipyard package now, send the line data sheet or the relevant drawing through the REQUEST A QUOTE form on woyuvalve. com, or contact the engineering team directly by email or WhatsApp. Ask the engineering team to confirm the bore range, face-to-face dimension, trim and bonnet options that match your drawing, and to flag any technical decision that remains before order release.
A：10K is the nominal pressure class in the Japanese system, roughly 1 MPa of nominal working pressure at the reference temperature. It tells you which flange drilling and pressure rating family the valve belongs to, and it is the class commonly used across shipboard steam, fuel oil and gas lines. Allowable pressure falls as operating temperature rises, so give the supplier the design temperature alongside the class and the answer stays accurate for your line.
A：Pull the line number, service medium, nominal bore, pressure class, flange standard and facing, face-to-face length, and design pressure and temperature from the drawing, then ask the manufacturer to confirm the valve is built to those values. JIS F7319 tells you the valve family; the drawing tells you the exact item. A supplier who can work from those details will confirm the match in writing, including the bonnet configuration and trim for the position.
A：Nominal size, pressure class, flange standard, facing type, bolt circle and bolt count decide whether the valve bolts straight on. JIS 10K flanges use a different bolt pattern from ANSI class 150 flanges of the same nominal size, so the drawing has to state the standard explicitly. Face-to-face length and working space around the body and handwheel matter just as much during installation as the bolt holes do.
Japanese Industrial Standards Committee
Valves Flanged Threaded and Welding End - ASME
