diff --git a/A00_Common/design/design_structure_form.ts b/A00_Common/design/design_structure_form.ts
index 0d570821d..e6df8ec91 100644
--- a/A00_Common/design/design_structure_form.ts
+++ b/A00_Common/design/design_structure_form.ts
@@ -212,7 +212,8 @@ export function createSpecForm(links: SpecLinks | null, hooks: SpecFormHooks = {
       const add = document.createElement("button");
       add.type = "button";
       add.className = "b05-route__irregular-btn b05-structure__spec-add";
-      add.textContent = `+ ${containerTitle(c, names, groupNames[c.link])} 추가`;
+      add.textContent = `+ ${containerTitle(c, names, groupNames[c.link])}`;
+      add.title = "추가";
       add.dataset.specAdd = c.id;
       add.addEventListener("click", () => {
         list.push({});
diff --git a/A00_Common/design/design_structure_spec.ts b/A00_Common/design/design_structure_spec.ts
index da42af76f..506858418 100644
--- a/A00_Common/design/design_structure_spec.ts
+++ b/A00_Common/design/design_structure_spec.ts
@@ -225,7 +225,7 @@ export const choiceLabel = (
 export function nameTable(spec: StructureSpec): SpecNames {
   const out: SpecNames = {};
   for (const c of spec.containers) {
-    out[c.id] = c.title;
+    if (!c.required) out[c.id] = c.title; // 필수 컨테이너 이름 = 정의 그룹 이름(M02 그룹 표에서 바꿈)
     for (const item of c.items) {
       out[`${c.id}.${item.id}`] = item.label;
       const all = [
diff --git a/B05_Profile/B05_Profile_UI_Style_Structures.css b/B05_Profile/B05_Profile_UI_Style_Structures.css
index 6b140043f..bb609526d 100644
--- a/B05_Profile/B05_Profile_UI_Style_Structures.css
+++ b/B05_Profile/B05_Profile_UI_Style_Structures.css
@@ -525,3 +525,22 @@
 .b05-structure__stale input[readonly] {
   opacity: 0.7;
 }
+
+/* 구조물 명세 컨테이너(PLAN 52-1) — 상자 차례 · 긴 잇기 이름이 상자를 밀어 넓히지 않게(fieldset 최소 폭) */
+.b05-structure__spec {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+
+.b05-structure__spec[hidden] {
+  display: none;
+}
+
+.b05-structure__spec .b05-structure__group {
+  min-width: 0;
+}
+
+.b05-structure__spec-add {
+  align-self: flex-start;
+}
diff --git a/resources/master_template/구조물정의.json b/resources/master_template/구조물정의.json
index 132169e26..5b2e2bf07 100644
--- a/resources/master_template/구조물정의.json
+++ b/resources/master_template/구조물정의.json
@@ -3234,14 +3234,12 @@
         "기슭막이_한벌"
       ],
       "이름": {
-        "pipe": "관",
         "pipe.diameter": "관경",
         "pipe.diameter=800": "800",
         "pipe.diameter=1000": "1000",
         "pipe.diameter=1200": "1200",
         "pipe.diameter=1500": "1500",
         "pipe.length": "관 길이 (m)",
-        "inlet": "관 보호공 (유입)",
         "inlet.structure": "구조",
         "inlet.structure=집수정": "집수정",
         "inlet.structure=기슭막이": "흙막이",
@@ -3259,7 +3257,6 @@
         "inlet.height": "높이 (m)",
         "inlet.before": "기준측점 전 (m)",
         "inlet.after": "기준측점 후 (m)",
-        "outlet": "관 보호공 (유출)",
         "outlet.structure": "구조",
         "outlet.structure=기슭막이": "흙막이",
         "outlet.form": "형태",
diff --git a/resources/tester/ui_checks/52-1_배관_컨테이너.js b/resources/tester/ui_checks/52-1_배관_컨테이너.js
new file mode 100644
index 000000000..02840470e
--- /dev/null
+++ b/resources/tester/ui_checks/52-1_배관_컨테이너.js
@@ -0,0 +1,202 @@
+/* 52-1 — B05 · B06 좌측 「구조물 배치」 배관 = 사용자 구조물 표 01 명세(컨테이너 다섯)
+ * 시작 화면: B05 종단설계(#/b05-profile) · 검증 프로젝트(sub5_검증) · 목록에 「배관 1」
+ * 부르는 법: 단계마다 한 번씩 — 앞에 `window.__m521 = "단계";` 를 붙여
+ *   orca eval --expression "window.__m521='edit'; $(cat 이 파일)"   → 고치고 [저장] (원래 관 지점은 sessionStorage 에 둠)
+ *   (orca reload 로 다시 열기)
+ *   orca eval --expression "window.__m521='verify'; $(cat 이 파일)" → 다시 연 값 · B06 같은 그리기 · 관 길이
+ *   orca eval --expression "window.__m521='restore'; $(cat 이 파일)" → 원래 관 지점으로 되돌림(PUT) · 초안 비움
+ * 쓰는 것: 검증 프로젝트 pipe_points.json(되돌림 단계가 원래 값으로 다시 씀)
+ * 기대 수치(edit): kinds 5 · required 3 늘 보임 · formBasin I형/L형/ㄷ형 · formSoil 6 · split 길이 7 ·
+ *   soilAdd 둘 → 하나 빼면 하나(콘크리트) · chute 하나(돌붙임) · 잇기 유입 지정 · 유출 지정 뒤 풂
+ * 기대 수치(verify): 저장 값 그대로 · 같은 그리기(B05 = B06) · 관 길이 수(B06)
+ */
+(async () => {
+  const MODE = window.__m521 || "edit";
+  const w = (ms) => new Promise((r) => setTimeout(r, ms));
+  const until = async (fn, ms = 20000) => {
+    for (let t = 0; t < ms; t += 200) {
+      if (fn()) return true;
+      await w(200);
+    }
+    return false;
+  };
+  const projectId = localStorage.getItem("frd_current_project_id");
+  const modUrl = (part) =>
+    performance
+      .getEntriesByType("resource")
+      .map((e) => e.name)
+      .filter((n) => n.includes(part))
+      .pop();
+  const fetchApi = await import(modUrl("/B04_PreProcess/B04_PreProcess_Api_Fetch.ts"));
+  const spec = () => document.querySelector(".b05-structure__spec");
+  const box = (c, i = 0) => spec().querySelectorAll(`[data-spec-container="${c}"]`)[i];
+  const ctl = (c, item, i = 0) =>
+    box(c, i)?.querySelector(`[data-spec-item="${c}.${item}"]`)?.querySelector("select, input");
+  const set = async (c, item, v, i = 0) => {
+    const el = ctl(c, item, i);
+    el.value = v;
+    el.dispatchEvent(new Event("change", { bubbles: true }));
+    await w(200);
+  };
+  const labels = (c, item) => [...ctl(c, item).options].filter((o) => o.value).map((o) => o.text);
+  const pickPipe = async () => {
+    await until(() => document.querySelectorAll(".b05-route__irregular-list li").length > 0);
+    const li = [...document.querySelectorAll(".b05-route__irregular-list li")].find((l) =>
+      /배관 1$/.test(l.textContent.trim()),
+    );
+    // 다시 열면 고른 것이 복원돼 있음 — 누르면 풀리므로 풀렸으면 한 번 더(재선택 = 해제)
+    (li.querySelector("button") ?? li).click();
+    await w(800);
+    if (!(spec() && spec().offsetParent !== null)) (li.querySelector("button") ?? li).click();
+    await until(() => spec() && spec().offsetParent !== null);
+    await w(500);
+  };
+  const shape = () =>
+    [...spec().querySelectorAll("[data-spec-container]")].map((b) => ({
+      c: b.dataset.specContainer,
+      legend: b.querySelector("legend").firstChild.textContent,
+      items: [...b.querySelectorAll("[data-spec-item]")].map((n) => n.dataset.specItem),
+      link: b.querySelector(".b05-structure__summary-name")?.textContent,
+    }));
+  const linkName = (c, i = 0) =>
+    box(c, i).querySelector(".b05-structure__summary-name").classList.contains("is-assigned");
+  const pickLink = async (c) => {
+    box(c).querySelector('[data-b05-summary="pick"]').click();
+    await until(() => document.querySelector(".ui-item-picker__tree .ui-tree__row"));
+    // 첫 잎까지 펼침
+    for (let k = 0; k < 8; k++) {
+      const rows = [...document.querySelectorAll(".ui-item-picker__tree .ui-tree__row")];
+      const leaf = rows.find((r) => !r.classList.contains("is-branch"));
+      if (leaf) {
+        leaf.click();
+        break;
+      }
+      const closed = rows.find((r) => r.querySelector(".ui-tree__caret")?.textContent === "▸");
+      closed?.click();
+      await w(300);
+    }
+    await w(300);
+    [...document.querySelectorAll(".ui-item-picker__actions button")]
+      .find((b) => b.textContent.includes("적용"))
+      .click();
+    await w(500);
+  };
+  const out = { mode: MODE };
+
+  if (MODE === "edit") {
+    const before = await fetchApi.fetchDetailPipePoints(projectId);
+    sessionStorage.setItem("__521_original", JSON.stringify(before.pipe_points));
+    await pickPipe();
+    const s0 = shape();
+    out.kinds =
+      s0.filter((b) => ["pipe", "inlet", "outlet"].includes(b.c)).length +
+      spec().querySelectorAll("[data-spec-add]").length;
+    out.required = ["pipe", "inlet", "outlet"].every((c) => box(c)?.offsetParent !== null);
+    out.addButtons = [...spec().querySelectorAll("[data-spec-add]")].map((b) => b.textContent);
+    // 형태 선택지가 구조를 따름
+    await set("inlet", "structure", "집수정");
+    out.formBasin = labels("inlet", "form");
+    await set("inlet", "structure", "기슭막이");
+    out.formSoil = labels("inlet", "form");
+    await set("inlet", "form", "돌망태");
+    // 길이 = 전 + 후 — 길이 10 · 전 3 → 후 7 · 이어서 후 4 → 길이 7(전 · 후를 지킴)
+    await set("inlet", "length", "10");
+    await set("inlet", "before", "3");
+    out.splitAfter = ctl("inlet", "after").value;
+    await set("inlet", "after", "4");
+    out.splitLength = ctl("inlet", "length").value;
+    // 선택 컨테이너 — 흙막이 추가 둘 → 첫째 뺌 · 도수로/돌붙임 하나
+    spec().querySelector('[data-spec-add="soil_add"]').click();
+    await w(200);
+    spec().querySelector('[data-spec-add="soil_add"]').click();
+    await w(200);
+    await set("soil_add", "structure", "기슭막이", 0);
+    await set("soil_add", "form", "바자", 0);
+    await set("soil_add", "structure", "기슭막이", 1);
+    await set("soil_add", "form", "콘크리트", 1);
+    out.soilAddTwo = spec().querySelectorAll('[data-spec-container="soil_add"]').length;
+    out.soilFormsSoilAdd = labels("soil_add", "form").length;
+    box("soil_add", 0).querySelector('[data-spec-remove="soil_add"]').click();
+    await w(300);
+    out.soilAddAfterRemove = [...spec().querySelectorAll('[data-spec-container="soil_add"]')].map(
+      (b, i) => [
+        b.querySelector("legend").firstChild.textContent,
+        ctl("soil_add", "form", i).value,
+      ],
+    );
+    spec().querySelector('[data-spec-add="chute_add"]').click();
+    await w(200);
+    await set("chute_add", "structure", "돌붙임");
+    out.chuteChoices = labels("chute_add", "structure");
+    // 구조물 조합 잇기 — 유입 지정 · 유출 지정 뒤 풂
+    await pickLink("inlet");
+    out.linkInlet = linkName("inlet");
+    await pickLink("outlet");
+    out.linkOutletPicked = linkName("outlet");
+    box("outlet").querySelector('[data-b05-summary="clear"]').click();
+    await w(300);
+    out.linkOutletCleared = !linkName("outlet");
+    // [저장]
+    document.querySelector('[data-dock-action="save"]').click();
+    await w(500);
+    out.saved = await until(() => !document.querySelector(".ui-overlay.is-active"), 60000);
+    const after = await fetchApi.fetchDetailPipePoints(projectId);
+    const p = after.pipe_points.find((x) => x.chainage_m > 80 && x.chainage_m < 90); // 배관 1 = 4+5
+    out.file = p && {
+      options: p.options,
+      group_items: Object.keys(p.group_items ?? {}),
+    };
+  }
+
+  if (MODE === "verify") {
+    await pickPipe();
+    out.reopened = {
+      inlet: ["structure", "form", "length", "before", "after"].map((k) => ctl("inlet", k).value),
+      soilAdd: [...spec().querySelectorAll('[data-spec-container="soil_add"]')].map(
+        (_, i) => ctl("soil_add", "form", i).value,
+      ),
+      chute: ctl("chute_add", "structure").value,
+      linkInlet: linkName("inlet"),
+      linkOutlet: linkName("outlet"),
+    };
+    const b05 = shape();
+    out.b05Length = ctl("pipe", "length").value;
+    location.hash = "#/b06-section";
+    await until(() => location.hash.includes("b06"), 5000);
+    await w(6000);
+    await pickPipe();
+    const b06 = shape();
+    out.sameDrawing = JSON.stringify(b05) === JSON.stringify(b06);
+    if (!out.sameDrawing) out.diff = { b05, b06 };
+    out.b06Length = ctl("pipe", "length").value;
+  }
+
+  if (MODE === "restore") {
+    const original = JSON.parse(sessionStorage.getItem("__521_original") || "null");
+    if (!original) return JSON.stringify({ error: "원래 값 없음" });
+    const keys = [
+      "chainage_m",
+      "source",
+      "facility",
+      "start_m",
+      "end_m",
+      "options",
+      "summary_item",
+      "group_items",
+    ];
+    const points = original.map((p) =>
+      Object.fromEntries(
+        keys.filter((k) => p[k] !== undefined && p[k] !== null).map((k) => [k, p[k]]),
+      ),
+    );
+    await fetchApi.saveDetailPipePoints(projectId, points);
+    for (const k of Object.keys(sessionStorage))
+      if (k.startsWith("aislo:draft:pipes:") || k === "__521_original")
+        sessionStorage.removeItem(k);
+    const now = await fetchApi.fetchDetailPipePoints(projectId);
+    const pick = (list) =>
+      JSON.stringify(list.map((p) => [p.chainage_m, p.options ?? {}, p.group_items ?? {}]));
+    out.restored = pick(now.pipe_points) === pick(original);
+  }
+  return JSON.stringify(out);
+})();